grep exclude multiple strings

Question

I am trying to see a log file using tail -f and want to exclude all lines containing the following strings    Nopaging the limit is    and   keyword to remove is    I am able to exclude one string like this   tail -f admin log grep -v  Nopaging the limit is    But how do I exclude lines containing either of string1 or string2

User · Answer

You can use regular grep like this   tail -f admin log   grep -v  Nopaging the limit is  keyword to remove is

User · Answer

egrep -v  Nopaging the limit is keyword to remove is

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Two examples of filtering out multiple lines with grep   Put this in filename txt   abc def ghi jkl   grep command using -E option with a pipe between tokens in a string   grep -Ev  def jkl  filename txt   prints   abc ghi   Command using -v option with pipe between tokens surrounded by parens   egrep -v   def jkl   filename txt   prints   abc ghi

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The greps can be chained  For example   tail -f admin log   grep -v  Nopaging the limit is    grep -v  keyword to remove is

User · Answer

Another option is to create a exclude list  this is particulary usefull when you have a long list of things to exclude   vi  root scripts exclude list txt   Now add what you would like to exclude  Nopaging the limit is keyword to remove is   Now use grep to remove lines from your file log file and view information not excluded   grep -v -f  root scripts exclude list txt  var log admin log

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tail -f admin log grep -v -E   Nopaging the limit is keyword to remove is

User · Answer

grep -Fv -e  Nopaging the limit is  -e  keyword to remove is    -F matches by literal strings  instead of regex   -v inverts the match  -e allows for multiple search patterns  all literal and inverted

[linux] grep exclude multiple strings

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