How can I exclude one word with grep

Question

I need something like   grep   unwanted word XXXXXXXX

User · Answer

I ve a directory with a bunch of files  I want to find all the files that DO NOT contain the string  speedup  so I successfully used the following command   grep -iL speedup

User · Answer

The -v option will show you all the lines that don t match the pattern   grep -v  unwanted word

User · Answer

I understood the question as  How do I match a word but exclude another   for which one solution is two greps in series  First grep finding the wanted  word1   second grep excluding  word2    grep  word1    grep -v  word2    In my case  I need to differentiate between  plot  and   plot  which grep s  word  option won t do      not being a alphanumerical    Hope this helps

User · Answer

If your grep supports Perl regular expression with -P option you can do  if bash  if tcsh you ll need to escape the      grep -P       unwanted word keyword  file   Demo     cat file foo1 foo2 foo3 foo4 bar baz   Let us now list all foo except foo3    grep -P       foo3 foo  file foo1 foo2 foo4

User · Answer

Invert match using grep -v   grep -v  unwanted word  file pattern

User · Answer

I excluded the root   quot   quot   mount point by using grep -vw  quot    quot     cat  tmp topfsfind txt  head -4  awk   print  NF      root  m2  root  var    cat  tmp topfsfind txt  head -4  awk   print  NF     grep -vw  quot    quot   root  m2  root  var

User · Answer

The right solution is to use grep -v  word  file  with its awk equivalent   awk    word   file   However  if you happen to have a more complex situation in which you want  say  XXX to appear and YYY not to appear  then awk comes handy instead of piping several greps   awk   XXX   amp  amp    YYY   file                        I want it                     I don t want it   You can even say something more complex  For example  I want those lines containing either XXX or YYY  but not ZZZ   awk    XXX      YYY    amp  amp    ZZZ   file   etc

User · Answer

You can do it using -v  for --invert-match  option of grep as   grep -v  unwanted word  file   grep XXXXXXXX   grep -v  unwanted word  file will filter the lines that have the unwanted word and grep XXXXXXXX will list only lines with pattern XXXXXXXX   EDIT   From your comment it looks like you want to list all lines without the unwanted word  In that case all you need is   grep -v  unwanted word  file

User · Answer

grep provides  -v  or  --invert-match  option to select non-matching lines   e g    grep -v  unwanted pattern  file name   This will output all the lines from file file name  which does not have  unwanted pattern    If you are searching the pattern in multiple files inside a folder  you can use the recursive search option as follows  grep -r  wanted pattern      grep -v  unwanted pattern    Here grep will try to list all the occurrences of  wanted pattern  in all the files from within currently directory and pass it to second grep to filter out the  unwanted pattern        - pipe will tell shell to connect the standard output of left program  grep -r  wanted pattern     to standard input of right program  grep -v  unwanted pattern

[regex] How can I exclude one word with grep?

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