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Sed: I want to remove a Word after all ``` in the given File

asked 2023-04-11 12:39:37 +0000

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answered 2023-04-11 12:40:09 +0000

qstack gravatar image

To remove the word immediately following "```" in a file, you can use the sed command with a regular expression to perform the substitution. Here's the command:

sed -E 's/(```)[[:alnum:]]+/\1/g' input_file.txt > output_file.txt

Here's the breakdown of the command:

sed: The command itself -E: Tells sed to use extended regular expressions 's/(```)[[:alnum:]]+/\1/g': The substitution expression s/: Starts the substitution command (````): Matches the three backticks and captures them in a group [[:alnum:]]+: Matches one or more alphanumeric characters /\1/: Replaces the matched pattern with the content of the first captured group (the three backticks) g: Global flag to perform the substitution for all occurrences in each line input_file.txt: The file you want to modify (replace this with the actual filename)

outputfile.txt: Redirects the output to a new file (replace this with the desired output filename) This command will create a new file (outputfile.txt) with the words immediately following "```" removed. If you want to perform the operation in-place (i.e., modify the input file directly), you can use the -i option:

sed -i -E 's/(```)[[:alnum:]]+/\1/g' input_file.txt

This command will modify the input_file.txt directly.

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Asked: 2023-04-11 12:39:37 +0000

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Last updated: Apr 11 '23