14 окт. 2014 г. · In a bash script, I have a list of lines in a file I wish to grep and then display on standard out, which is easiest done with a while read.

23 авг. 2010 г. · grep -v is your friend: grep --help | grep invert -v, --invert-match select non-matching lines Also check out the related -L (the complement of -l).

4 сент. 2019 г. · The actual answer to this question is to add || true to the end of the command, eg: echo thing | grep x || true. This will still output a 0 return code.

17 дек. 2013 г. · while read vl; do grep "^$vl" Table_S4.tab || printf "\n" done < 1 If grep doesn't find a match, the printf command will be run and output an empty line.

27 февр. 2021 г. · I want to iterate through the file1 words and search for these in file2. I want to print the words that are NOT found in file2 ... So the output ...

10 янв. 2022 г. · I want to extract strings between two patterns with GREP, but when no match is found, I would like to print a blank line instead.

19 окт. 2021 г. · I want to use grep with regex to match part of a line, then proceed to print that line and the next 2 lines. But I don't want to print any match.

20 июн. 2011 г. · This code searches for the literal twice, once during grep to quickly extract matching lines and once during =~ to remove the match itself from ...

30 июл. 2013 г. · How to easily print line above the match and skip the match itself? grep -A , -B and -o opt do not solve it. Maybe some awk magic?

8 мая 2023 г. · I want to run a particular command, check the output of that command for that input string, first returning lines that match on <input string>$ ...