Grep a specific string from bash script and compare

Question

i have a large log file A.log, i want to grep ONE CERTAIN STRING from the last 10 lines and compare to a variable (FTP_SUCCESS_MSG), how can i do that?

something like:

logs='/tmp/A.log'
FTP_SUCCESS_MSG="226 Transfer complete"
if [tail -10 $logs == $FTP_SUCCESS_MSG] ; 
then 
    echo "Success"  
else
    echo "Failed"
    exit 1
fi

Community · Accepted Answer · 2017-05-23 12:27:21Z

1

if tail -10 "$logs" | grep -Fq "$FTP_SUCCESS_MSG" ;  then ...

Notice how [ is not present in the condition (and if it were, it would require non-optional spaces on both sides).

Notice also how variable interpolations are in double quotes unless you require the shell to tokenize the value and perform wildcard expansion on the tokens.

edited May 23, 2017 at 12:27

CommunityBot

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answered Oct 20, 2014 at 3:27

tripleee

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