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I already have a log say file.txt.

I will like to check in Bash, if a string (July) exists in the log and if so, check the remaining lines in the log for another string (foobar).

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  • the "remaining lines" in Q, you meant the lines after the "July" line, right? Commented Jul 20, 2013 at 22:09
  • yes, immediately after "July" Commented Jul 23, 2013 at 11:15

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if you have awk available, an awk oneliner could do it for you:

awk '/July/{f=1} f&&/foobar/{print "Found foobar after July!";exit}' file

if no July or no foobar after July, the command prints nothing. of course you could make an if-else, to let it print "not found" or something.

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