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

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

User · Answer

egrep -v  Nopaging the limit is 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

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

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

User · Answer

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

[linux] grep exclude multiple strings

Two examples of filtering out multiple lines with grep:

Examples related to linux

Examples related to ubuntu