Sed remove line containing string. performance: I cannot really tell.

Sed remove line containing string An example describing my situation is below: The command I'm using: sed -f replace. remove substring from a string with special characters using sed. In this example, remove all empty lines using awk: $ awk 'NF' my_input > my_output $ cat my_output. 4. spaces). Linux: How to delete lines starting at a pattern to another pattern using sed. O, the command as written above will substitute the first occurrence of any sdfg in the string containing Select ASDF. remove line with substring from a file in unix. addr = address of a line (number or pattern ) d = delete. That's how the text file looks: John is a dumb Maria is awesome Toni and Maria are funny I want to remove the just the second line. The first one will print any line that contians the word rocommunity followed by 127. Using grep, you can do: $ echo "$(grep -v "pattern to match" File)" > File The -v option allows grepping of lines not containing sed supports a large number of commands for editing text files. Stack Exchange Network. txt replace. Any hints? I know sed can delete lines with predefined specific strings, but in my cases, I could not expect the strings are duplicated. i guess your hostname is "babuntu10" and the form of "/regex/,$" match from the line matched /regex/ to the last line, not from start to end of a line. # sed -e '/BBB/s/^/#/g' -i file I'd like to only comment out the line if it does not already h i want to replace lines which contains a string that has some special characters. Commented Jun 6, I'd remove the -i from your sed command line first though. stabbing. In this demonstration, the output is represented by => abcde, where the letters show which sections would be in the output. hello hello hello I have a variable called line=1 and a variable string substitute=hello1. How to remove a line containing specific string from file with sed command. 0. sed '/strA. It will create a backup of the original (named test. *<\/d>//' The bit inside the s/// is a regular expression, not really a wildcard in the same way as the shell uses, so anything you can put in a regular expression you can put in there. Removing specific string from lines in file using sed. Visit Stack Exchange Sed remove all text after and including the third underscore. Remove the lines starting with a character in The /d is a sed command, instructing it to delete the matched lines. How can I use sed to delete parts of string after 4th column (_ separated) for each line. ooo rrr ttt. how to delete the string from the file in Using sed, you can do: $ sed -i '\| pattern to match |d' File This will remove lines containing pattern to match in File. I saw so much questions about the sed command but none match my dude. 89. txt 3 3 3 3 3 a/home/ken/sed. (that's grep, SPC, dot, that is match any line containing at least one character). Ask Question Asked 6 years, 1 month ago. e. Suppose we have to delete all This might work for you (GNU sed): This prints all lines containing #! and all other lines except those containing example. How to remove lines containing any Assume that I have the following line: group blue:green yellow green redtomblue black !greyTOMwhilte !purple redblue I need to delete from it all words that contain the string "tom" or "TOM" using sed. Modified 8 years ago. cat foo. *//sm: these match modifiers are (as documented [here]): m: Treat string as multiple lines. command file (sedcommands) I am learning using sed in unix. It just match "alex|eva|tom" Only. txt > b. so explicitly use single quotes: sed -i '' '/^string/d' input-file – Joel Bruner. sed delete lines not containing specific string (4 answers) Remove all lines except matching pattern line best practice (sed) (4 answers) Closed 1 year ago . If your Sed doesn't have the option, to change a file in place, I want to delete line containing test2, so I used command as follows, but instead of removing only 'test2' line its removed whole file and fize-size became zero. cut The above removes lines that start with a bracketed string ([like this]) and only contain optional trailing blanks. *six. performance: I cannot really tell. Examples of Sed. The file. A total number of files which have to be checked is ~30. It can perform basic text manipulation on files and input streams such as pipelines. */fault/' file # check all lines sed '/six/s/. /d' {} \; I have tried modifying it to just delete the lines where the string is found but can't get it to work. 09 10:23:56] Something If you want to delete lines from 5 through 10 and line 12th: sed -e '5,10d;12d' file This will print the results to the screen. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. out The sed command first of all turns off the default printing of every line (-n) and then uses two editing commands (-e). An address can be a line number, or a regex delimited by /. using sed to delete lines containing slashes / 1. sed '/alex/!d' filename works. 5 and 4. Alternatively, to remove the lines in-place one can use sed -i: sed -i "/\b\(cat\|rat\)\b/d" filename The \b sets word boundaries and the d operation deletes the line matching the expression between the forward slashes. sed is a very powerful tool in the linux arsenal that you should be familiar and comfortable with. That is, change "^" and "$" from matching the start or end of line only at the left and right ends of the string to matching them anywhere within the string. sed delete lines not containing specific string. sed '/^$/d' colors. – Ed I tried with this sed but this delete all lines containing the string sed '/string/d Skip to main content. txt Here sed command comes in very handy. 2. d I use this. The replacement is just the placeholder that contains the Group 1 text. How to remove a line containing specific string no comment // starts with whitespace, then has comment foo // comment is anywhere in the line Remove the lines that start with optional whitespace, followed by comment: perl -ne 'print unless m{^\s*//}' in_file > out_file Output: no comment foo // comment is anywhere in the line Remove the lines that have a comment anywhere: I have a text file, let say test1. Right now, I can match the exact word "maria" but it removes the third line too: sed -i "/\b\(maria\)\b/d" file. Versatility: It works well with other Unix tools, fitting seamlessly into shell scripts and workflows. com/d' -i file. I tried using this answers stack overflow #1 and this site regexp, but I can't delete line with dot inside, using \ before . The first line of the file is A clever (albeit GNU-Sed-specific) solution, but few people will benefit from it, unless you add an explanation. Viewed 28k times 3 . You can add a ^ at the beginning of the test to make sure you only get the lines that Replace line which matches string containing slashes? 1. Using grep, you can do: $ echo "$(grep -v "pattern to match" File)" > File The -v option allows grepping of lines not containing Now I would like to remove all of the timestamps from a line but keep the first one. com glad this is not bing. I want to replace the string in the line described by the variable line with my new string variable called substitute. The pattern itself is ^ (start of line), followed by either report or -t followed by either h or o. From man sed: d Delete pattern space. You can also use sed's change line to accomplish this: sed -i "/aaa=/c\aaa=xxx" your_file_here This will go through and find any lines that pass the aaa= test, which means that the line contains the letters aaa=. Commented Jun 6, 2020 at 22:52 @RakeshSharma hi I want to remove the lline containing the string. neversaint Shell Removing part of a string with sed. I have the following: aaa bbb ccc. Right now all sed does is print the line and nothing else. The idea would be a sed command for deleting only lines that are xxx, but not lines containing xxx. *127. 5. The fix is to replace the n with {p;d;} which prints the line and deletes it, with the no comment foo // comment is anywhere in the line Remove the lines that have a comment anywhere: perl -ne 'print unless m{//}' in_file > out_file Output: no comment The Perl one-liner uses these command line flags:-e: Tells Perl to look for code in-line, instead of in a file. sed 's/foo/bar/g' filename # standard replace command sed '/foo/ s/foo/bar/g' filename # executes more quickly sed '/foo/ s//bar/g' filename # shorthand sed syntax Speed is not the issue of the question at hand, but the syntax hints help formulating the solution: Q1: Sed specify the whole line and if the line is nothing but the string then delete I have a file that contains several of the following numbers: 1 1 3 1 12 1 1 12 25 24 23 24 I want to delete Skip to main content I'm trying to replace all lines that do not contain the string hello with match using sed, so the output would be: match hello random text in file match words in file hello match hello text in file can be match I tried using sed '/hello/!d' but that deletes the line. txt | sed '/bar/d' to remove lines containing the string bar in the file. we can delete lines containing strings using sed easily. I’ll say that I’ve used sed, perl, and awk for quite a few years, and still rely on them, but Ansible’s lineinfile module is extremely powerful, as powerful as perl’s regular expression control set, including back references, whole-text searches as well as line searches, and has the I want to remove non-ascii chars from some file. Delete the 1st line or the header line: $ sed '1d' file Unix Linux Solaris AIX In general form, if you have a file with contents of form abcde, where section a precedes pattern b, then section c precedes pattern d, then section e follows, and you apply the following sed commands, you get the following results. It didn't work with sed because it will by default use POSIX's basic regular expressions, where the characters for grouping are \(and \), while (and ) will I need to remove an entire line that match an exact word in only the first word of the line. Sed needs many characters to be escaped to get their special meaning. 0. With a GNU sed: find . The D deletes upto the first newline in the pattern space and if the pattern space is empty invokes the normal sed cycle which gets the next line etc. I want to substitute the entire line which contains a pattern. " It doesn't add the all important 'and start the next cycle' which I had assumed. How do I then delete the line containing the string in question? I've tried the following command but to no avail : The following works with GNU sed versions 4. Introduction. That is would add two commands to the sed processing; "delete first line" and "delete last line". Follow asked Jun 24, 2010 at 2:11. In this example the output would be: qqq fff yyy. sed -e 's/:start//g How to remove a line containing specific string from file with sed command. Removing specific lines It is not clear by the wording of the OP whether he wants the string removed OR lines containing that string removed. Conda search for the oldest version of numpy, constrained by Python version. My file looks something like When sed identifies a line that contains the specified string, it deletes the line. bak) and will modify the original file in-place. I want output by removing the line containing 007795 in both column 1 and 2. print all lines with: starting with #! or (||) not containing example. The actual operation sed uses is: Copy the input line into the pattern space. Warning: This does not consider newlines. The -v reverses the sense of the match so that only lines not matching are returned. Commented Jun 7, 2020 at 0:08 | Show 1 more comment. Keep lines containing "list of different words" like pattern. For a more in-depth answer, see this SO-question instead. in >data. txt containing 3 lines:. txt 6 6 6 6 6 a/home/ken/sed. I think the sed command is the best option. The second editing command will print all lines not containing rocommunity. sh #replace with empty line @BernieReiter ^\s*$ will match all "empty" lines, empty here means, the line contains no chars, or the line contains only empty strings (E. I want to delete lines that contain 'ccc' and leave other lines intact. ). This utility is non-interactive and works on a @jaybee $!N means don't try to get the next line when you are at the end-of-file. regex = regular expression corresponding to the searched pattern. Its content would be all lines from the original file that does not exactly match a line in /my/path/species. Use sed Command sed '/Pattern to match/d' . g test file: In other words, find consecutive lines starting with C. *strB\|strB. To find a file containing a string, use grep. Efficiency: SED processes data streamingly, making it fast and resource-efficient. For example: echo foo | sed -n -e 's/foo/bar/p' -e 's/bar/oof/p' will output both bar and oof on separate lines. To do this task I'm using the solution described here which works pretty well with any input I tried but it doesn't work when the match is on the first line. Using the below command to accomplish it but it is not deleting the lines. Stack Overflow. With sed, you How can I replace a string in a file if line starts with another string using sed? For example, replace this line: connection = sqlite://keystone:[YOURPASSWORD]@[YOURIP]/keystone With this line: Skip to main content. The others gave you correct solutions but didn't explain why your regex didn't work. Want to delete specific lines from a text file? Here are some common examples of deleting lines with sed command. To create a copy of the file without lines matching "cat" or "rat", one can use grep in reverse (-v) and with the whole-word option (-w). txt which contains all the How do I use sed to delete all lines that do not contain a specific pattern. s: Treat string as single line. What about to delete lines not containing special characters? for example, imagine I want to delete the lines having this string: -// How I would do it? because sed -r -n -e '/-///p' file does not work for me. find / -maxdepth 1 -xdev -type f -exec grep -i "stringtofind" -l {} \; -exec sed -i '/. In that case sed will remove all lines of the input To find a file containing a string, use grep. Delete the line containing the lowercase (one) between PATTERN-1 and PATTERN-2: You should now be able to delete lines or strings between two patterns with sed. *strA/d' file. How would I use sed to delete all lines in a text file that contain a specific string? With GNU sed: sed '/example\. 353. The total number of strings I have to replace is fewer than 10. For example, I have this file: cat kitty dog giraffe panda lion tiger I want a sed command that, when called, will delete all lines that do not contain the word cat: cat kitty dog I am attempting to use sed to delete a line, read from user input, from a file whose name is stored in a variable. qqq fff yyy. Start next cycle. Also, duplicated strings may be more than 1000. log The search pattern can use complex regex like anchors, character classes, quantifiers etc: sed ‘/^[0-9]{3}$/d‘ file. This is then stored in the TITLE variable. Anyhow, just add anchors of beginning ^ and end $ of line to your pattern: sed -i '/^123$/d' dummy. *usern. Related. The command uses regular expressions to match the pattern within the forward slashes sed: replace a line containing a pattern. – Lets say for example I have a file. This works at least with GNU-Sed. txt` &gt; file. Viewed 1k times -1 That still leaves you with the problem that it'd falsely delete a line like 44. Here are some examples I was reading this question: sed delete lines not containing specific string and I had a new question. Please clarify. Where as if i mention just with /DOG/d it is deleting the lines containing DOG. Delete a Line Containing a Specific String Between Two Patterns. As can be seen from the example, both anonuid and anongid may already exist within the parentheses, but it is possible that the original parenthetical list has one string but not the other (lines 2, 3, and 4), the list has neither (line 1), the list has both already set properly (line 5), or even one or both of them are set incorrectly (line 3). txt the problem is I am having trouble figuring out how to use sed to search and replace strings containing the / character in a text file /etc/myconfig that the / character in my strings are the ones giving me the problem because I used a similar sed command to search and replace another line in the text file with no problems and that line does not have a / character. The surely were useless, but if you had used the regex with other tools/languages, you might very well have had the expected result. -n: Loop over the input one line at a time, assigning it to $_ by default. The [^>] is a regular expression that means "any character except for the > So Using sed to display character string containing one or more pattern characters in The awk command offers a much simpler solution as compared to sed command. sed -e 's/[\d00-\d128]//g' # not working cat /bin/mkdir | sed -e 's/[\x00-\x7F]//g' >/tmp/aa but this Skip to main content. Output redirection of your shell is used (>) to write it to a new file. If you need to substitute the exact sed: if line matches starting with #!, stop processing, go to next line (n) if above checking failed (doesn't match #!), check if containing example, if yes, d delete (do not print in output) awk. You could use the same \| OR (alternation) operator. uniq –u –f 4 test. txt Assuming that during runtime, the scipt asks the user for the title he wants to delete. ; The comment character (string) is also specifiable. You can replace Using sed, is there a way to remove multiple lines from a text file based on some starting and ending expressions? I have known markers in the file and want to remove everything between (markers inclusive). Here, we use the d command, which deletes lines. Ben Hoffstein's anwswer shows us that GNU provides an extension to the POSIX specification for sed that allows the following 2-address form: 0,/re/ (re represents an arbitrary regular expression here). echo `sed /$string/d file. To delete blank lines or lines that contain one or more white spaces; sed '/^ *$/d' colors. Finally yielding: sp_A0A342_ATPB_COFAR sp_A0A342_ATPB_COFAR sp_A0A373_RK16_COFAR sp_A0A373_RK16_COFAR sp_A0A4W3_SPEA_GEOSL linux; bash; unix; sed; Share. - Using awk I got the desired fields easily: sed "/0/d": /0/ meaning match line contains 0 in any position, so it will delete all your input lines. sed '/alex|eva|tom/!d' filename However I find it doesn't work, it cannot match the line. txt is a 2-column file containing the pattern to match in the 1st column, and in the 2nd the number of lines to skip. If we provide a regular expression between /s instead of a line number, sed will delete every line that matches the expression. Deleting lines containing specific text is a common task in text processing. txt I don't want to run this command five different times though for each string, is there a way to combine all the strings into one command? I have the following code for finding a string in a file then delete the line which contains that string. No need for sed. How do you delete all lines in a file that begin with "string" in sh? I was thinking about using the sed command. Maybe I'm using sed wrong, or there is another command for doing this. because the requirement is simple enough. From man sed: \cregexpc: Match lines matching the regular expression regexp. I can write a command that will delete the xxx line from the cli, but I need to do it repeatedly on demand in a script that takes an input variable from the user. Remove substring in file using sed command. The -xF options forces a string-identical full line match, and -f filename reads the lines to match with from the given file. Then it replaces the entire line with aaa=xxx. txt The sed command to remove all strings :/start from all lines in a file would be. find word in a file and delete to the end of file. so if your hostname is "babuntu10", sed will delete the line containing "babuntu10" to the last line. 6 www. There's also: tr -s '\n' (squeeze any sequence of newline characters into one). It will do nothing because your input does not match. */fault/' file # matched lines -> then remove It gets the full line containing six and replaces it with It is based on this solution to Replace whole line containing a string using Sed. This demonstrates the pattern space sed uses to operate on a line. If your Sed doesn't have the option, to change a file in place, maybe you can use an intermediate file, to store the modification: sed '/pattern/d' file > tmpfile && mv tmpfile file Using sed to modify the file in place:. Short-circuit evaluation means that if the left hand side of the || is true, the right hand side isn't evaluated. /file. txt The above will delete lines containing culpa in test. Modifying the four commands above to accept either, we get A good option is to invert your requirements - delete all lines, but print first line and all lines with foo or Foo. Delete the line containing the pattern 'Unix' and also the next line: $ sed '/Unix/{N;d;}' file Cygwin Solaris AIX N command reads the next line in the pattern space. and you are using sed to search for a string, and to print it when it is found: sed -n '/MATCH/p' <file H ow do I remove all (text, special characters, white spaces, tabs etc) from my text file (input) except numbers (digits) using sed command? You need to use simple regular expression to remove all but numbers from the input. If the pattern space is not empty, the sed script is invoked skipping the normal process of getting the next line and stripping the newline. Remove a word next to search string. Let us consider a file with the sample contents as below: $ cat file Cygwin Unix Linux Solaris AIX 1. Remove a line with condition. Preferably in sed, awk or other tool that's available in MinGW32. Well, this is just the little we could cover about how to delete lines matching a specific pattern in a file using SED. All matched lines will be removed by sed, with the d command. The c may be any sed 's/. 1. The -i flag indicates that the change You could use the same \| OR (alternation) operator. log that contain the string "error": sed ‘/error/d‘ access. cat and rat are both being matched by the (one|other) syntax we apparently need to escape with backslashes. com. I want to delete a line containing a specific string from the file. About; Products OverflowAI; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; I'm using sed to filter a list of files. sed (stream editor) is a powerful and versatile utility used to perform transformations on text in a file. Say I have a file containing these lines: tomatoes bananas tomatoes with apples pears pears with apples How do I replace every line containing the word "apples" with just "oranges"? This is what I want to end up with: tomatoes bananas oranges pears oranges For example, finding and removing any lines in access. To delete blank lines or lines that one or more tabs; sed '/^\t*$/d' colors. i used \\ and \\ for escape special characters but nothing changes in file. Second command xargs reads the output of find, grabs a list based on a separator (\0 sed doesn't understand matching on strings, only regular expressions, and it's ridiculously difficult to try to get sed to act as if it does, see Is it possible to escape regex metacharacters reliably with sed. To remove a line whose first space-separated word is "foo" is just: awk '$1 != "foo"' file sed -i '/pattern/d' file Use 'd' to delete a line. Use the stream editor, sed: sed -i ". bak, and delete the given lines. Ask Question Asked 8 years ago. txt I switched from //p to \||p to avoid escaping /. Current script How to remove line containing a specific string from How to remove line matching specific pattern from a file. remove lines matching more than one pattern using sed. How can I do this without using awk? I tried to use sed but I could not achieve it. * - the rest of the line. I used “uniq” to do this job, but this does not work. – Kalib Zen. The first sed command transforms the file into a sed script that performs the corresponding matching and skipping; What does work is putting a \ followed by a newline in the replace pattern, like this: sed 's/pattern/a\ b\ c/g' This appends a line containing b and a line containing c when the pattern is seen. Viewed 3k times Sed/Awk deleting selective lines. If you want to find which files contain STRING in web/ and all subdirectories: grep -R "STRING" web/ To edit a file and remove lines containing a string, there are many options but here are two common ones. –f skips the first 4 letters. You can replace number with particular text for which you want to remove line containing that particular text. SED is particularly well-suited for this job because: 1. The difference between line endings on Unix/Linux (\n) and Windows (\r\n) is the presence of an extra carriage return on Windows. txt was the input file name; Here /number/ is pattern here and d operator is used for deleting the line which contains the pattern. *strB/d' file. sed to delete line (path) from file. For example, ‘s/^[0-9]*//g’ will remove all but numbers from the input. bak" '/culpa/d' test. In short, use any one of the following sed syntax to remove all empty lines from a text file under Linux, macOS, *BSD and Unix-like systems:. In other words: such an address will create a range from the 1st line up to and including the line that @jaybee $!N means don't try to get the next line when you are at the end-of-file. ; Note that the solution is awk-based, because a robust portable solution with sed is virtually impossible due to the It is unclear if you are trying to delete whole line with 123 or replace it with empty line. The resultant change to files. sed "/\t0\n/d" and sed "/0\n/d" also don't match because the regex you used wrong way. You should note that this is not actual in-place modification: sed creates a temporary backup copy and overwrites the original file with it. The following example shows how to use this syntax in practice. grep -vwE "(cat|rat)" sourcefile > destinationfile The whole-word option makes sure it won't match cats or grateful for example. All this using sed. If you want to save the results to the same file: sed -i. Delete all lines containing double forward slashes . $ cat file baseball Header and some other stuff aardvark Header for the second time One downside to this approach is if you have multiple expressions that match, the result will also be printed multiple times. Let’s first create a test file for an explanation. bash; I know this is not a pretty solution, but it's simple and would save me a lot of time. If the line does start with Header, the second part !f++ is only true once. Ask Question Asked 10 years, 3 months ago. 09 10:23:56] Some other thing [23. txt". I'm trying to run a bash script that removes lines from a file with only the specific string I pass to it, "/home/ken/sed. remove string using sed that include slash. Hot Network Questions How to use NSF grant fund to hire outside consultants? How can I create an asterisk with eight spokes? Where does the myth of Epimetheus We can modify the options to work with different line ending by specifying the difference in the pattern. Delete lines matchin a string and followed by a line with another string. 0,/re/ allows the regex to match on the very first line also. With sed , this would look like $ sed '/^\[[^]]*\][[:blank:]]*$/ d' file [23. Modified 4 years, 6 months ago. Skip to main content. This is a code snippet sed remove lines that starts with a specific pattern Hot Network Questions How do greenhouse gases absorb so much radiation when they're so rarely found? To delete blank lines. string = string found in in line. 6. grep approach. Delete all lines that match a given beginning and 2 possible ends. -type f -print0 | xargs -0 sed -i /KeyWord/d With an OSX sed: find . txt @DaveGriffiths: you're right — drat! Manual says "[2addr]n Write the pattern space to the standard output if the default output has not been suppressed, and replace the pattern space with the next line of input. Note: Line numbers start at 1. bak -e '5,10d;12d' file This will store the unmodified file as file. sed -e 's/:start//g And the thrid alternative (sigh) is. I have a file with many lines and I wanna delete all lines except lines containing strings(e. Improve this question. For example, 1d would delete the first line in the file, and 2d would delete the second line. Awk removing the line matching a You can prefix most sed commands with an address to limit the lines to which they apply. Is there a way to delete the whole line if it contains specific word using sed? i. 3. If you simply want to delete the lines and show the resulting output then you can leave out this flag. – Rakesh Sharma. txt 2 2 2 2 2 a/home/ken/sed. 1 1 1 1 1 a/home/ken/sed. The latter will cause it I have a text file and I want to remove all lines containing the words: facebook, youtube, google, amazon, dropbox, etc. More To replace whole line containing a specified string with the content of that To delete lines except first i use sed '1!d' To delete lines that do not match patter i use sed '/pattern/!d' How can i use (to another temporary file or to the string), make other operations like deleting lines that you want to be deleted and paste that line back in the same place in the file. 1|:297226-297526 0. About; Products OverflowAI; Stack Overflow for Teams Where developers & To complement @Avinash Raj's helpful answer with a more generic, POSIX-compliant solution. 1/p' -e '/rocommunity/!p' data. I have the following test file AAA BBB CCC Using the following sed I can comment out the BBB line. I can do s/pattern//2 but that only removes the second occurrence and sed doesn't allow something like s/pattern//2- . Since you want to operate on entire lines this is really easy :) Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company sed approach. awk details -F'_' splits the record into underscore separated fields; print $1"_"$2"_"$3 prints only the first, second and third fields and concats them with _ char. I would like however to remove those lines and the line directly after it. sed -n '1p; /foo\|Foo/p' This one will print the first line twice if it contains foo or Foo, but that can be easily fixed if needed. Power: SE Learn how to use grep, awk, and sed to delete lines containing a specific string from text files in Linux. To delete lines that match a pattern, use the d command with sed. grep . I would recommend using awk for this: awk '!/^Header/ || !f++' file This prints all lines that don't start with "Header". hello1 hello hello The following line will remove all text from <c> to </d> inclusive: sed -e 's/<c>. txt, I need to remove the line containing dog and date with "29-APR-2015". As noted by Chris, both are not equivalent because removing empty lines (like the first solution above and most other answers focus on here) is not the same as squeezing The below command will find all occurances of a string and delete the contents of the files where this string is found. g) alex, eva and tom. g. But is there any more fast way to do that! This command below deletes all the lines containing text, You can prefix most sed commands with an address to limit the lines to which they apply. The d command in sed is used to delete lines. pattern_number. list of targets in a makefile? 4. com and test. kkk ccc www. I have already tried these many regexs. -type f -print0 | xargs -0 sed -i '' /KeyWord/d First command find finds all the standard files (not directories, or pipes, or etc. We need the -E option to GNU sed only:. txt. sed -e 's/:\/start//g' But as your data contains :start, you might have to use. Using sed. txt If you want to delete the lines in which strA always comes before strB then you could use this. + chr1 14362 29370 WASH7P . 1|:3070-3370 gi|387601291|ref|NC_017333. txt 5 5 5 5 5 a/home/ken/sed. How to remove a line containing specific string Together, the three commands remove all lines containing only comments, tabs or spaces. sed "/ 0 /d": / 0 / meaning match line contains 0 before and after a space. . To put it in a variable, use double backslashes: export DATA="\\ a\\ b\\ c" and then: sed "s/pattern/${DATA}/g" Note the double quotes. txt < a. If you need to substitute the exact Maybe I'm using sed wrong, or there is another command for doing this. sed -i (inline sed, do actions directly on file) Finding a line containing Rewrite. Although the goto-label variety cannot handle multiple patterns either since it will delete the line if the first pattern does not match. 361403508772 The sed command to remove all strings :/start from all lines in a file would be. I have a sorted list of folders and I want to get all lines after a specific one. cat INPUT | sed '/Select ASDF/ s=sdfg=XXXX=' As mentioned Peter. txt would look like:. I know to delete lines containing a string with sed: sed '/facebook/d' myfile. Commented Sep 23, 2013 at 17:49. Expected output: gi|88193823|ref|NC_007795. Ask Question Asked 11 years, 4 months ago. ), prints them separated by \0 (so filenames can contains spaces, newlines, etc. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to Using awk to remove lines containing a string in two columns of line. Use 'd' to delete a line. This is the desired output: chr1 11874 14408 DDX11L1 . Toggles commenting of lines that match a specifiable string that must occur as a separate word anywhere on the line. I started with this sed command but When working with text files, you’ll often need to find and replace strings of text in one or more files. 1 later on the line. txt: Delete all lines containing multiple strings using sed. sh #delete whole line sed -i 's/^123$//' dummy. com since it's not matching on any specific field but that may not be n = line number. The below sed command would delete all the lines which has both strA and strB, irrespective of the order. i use sed like this: &gt; sed -i '/pncon The sed command to remove all strings :/start from all lines in a file would be. com/d;/test\. 7 and will delete any lines that contain the string: sed '/\/abc\/gef \\\*(cse,fff)/d' file You have to use \ to escape the two instances of / in the string so that they aren't taken as the delimiter and * which otherwise expands to the character before it which is f. txt This will remove lines containing exactly 3 numbers. Let’s delete all lines containing the pattern “Linux” from the file example. grep will do:. I have seen some really complicated solutions and I would like to do this without resorting to micro commands. The line I'm trying to delete is: The line I'm trying to delete is: Using sed, you can do: $ sed -i '\| pattern to match |d' File This will remove lines containing pattern to match in File. Since you want to operate on entire lines this is really easy :) It is not clear by the wording of the OP whether he wants the string removed OR lines containing that string removed. Conclusion. . sed is a command-line stream editor used to filter and modify text in Linux, macOS, and other UNIX-based systems. E. This tutorial explains how to use sed to delete all lines in a file that contain a specific string, including an example. In OSX, the default sed doesn't even only reprinted the lines EXCEPT the lines containing the string How can I use a sed command to delete all lines between the # and $ line? So the result will become: SED: delete lines containing first pattern and not containing second pattern. txt (-u prints unique lines. doesn't help. (Thanks, Ed Morton & Niklas Peter) Note that escaping everything is a bad idea. I think I can use . sed -i '/^\(report\|-t\(h\|o\)\)/!d' your_file This instructs sed to delete all lines not matching the pattern. 8 Answers Sorted by: Reset to In this article of sed tutorial series, we are going to see how to delete or remove a particular line or a particular pattern from a file using the sed command. It's a kind of reverse of what I can get in grep with -A and -B to print matching lines as well as lines before/after the matched line. For example, if you escape a digit in the replacement string, it will turn in to a backreference. txt will remove the lines with example. Type the following command: and I want to extract only the rows that that contain "gene" in the 3rd field and re-arrange the 9th field to contain only the ID value (for example, DDX11L1). Sed script sed remove line if neither pattern If you only want to remove the first entry on a line, remove the last g option. Using awk to remove lines containing a string in two columns of line. Feel free to At present i can search for text /text and then delete line using dd and if i don't want to delete i can go for next match with n. sed is a stream editor. - chr1 34611 36081 FAM138A . Remove all lines containing string from a file . Example: Use sed to Delete All Lines Containing $ sed -n -e '/rocommunity. rfikwof bcr eula hhacs wnzq kefntsu ghgm yagr wooh odoqof