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ust	06-10-2009 03:45 AM

grep file

I would like to ask if I want to grep somthing .

I know the command " ll |grep Jun" can grep file with Jun , if I want to grep file with May and Jun , what can i do ? thx

Nylex

06-10-2009 03:46 AM

Yes you can use grep to search through files. Read the man page..

Simple example: grep "foo" stuff - this searches for the string "foo" in the file "stuff".

jdkaye

06-10-2009 03:50 AM

Just use the "man" command to find out things like this.

Code:

man grep

gives this information:

Quote:

Alternation
Two regular expressions may be joined by the infix operator |; the
resulting regular expression matches any string matching either alternate
expression.

cheers,
jdk

pixellany

06-10-2009 04:43 AM

Quote:

Originally Posted by ust (Post 3568923)

I would like to ask if I want to grep somthing .

I know the command " ll |grep Jun" can grep file with Jun , if I want to grep file with May and Jun , what can i do ? thx

Do you mean "May and Jun", or possibly "May OR Jun".

OR:
egrep '(May|Jun)' filename

AND:
egrep 'May' filename | egrep 'Jun'

Note the two very different meanings of the "|" operator.

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