Shell Programming and Scripting

hi team,

i want to compare the below string from logs, but its is not working.

Code:

if [[ $res != "percent: 0%" ]]; then

echo "restart some process"

fi

Please use code tags as required by forum rules!

WHAT is not working? Any errror messages? What's the contents of res?

In addition to what RudiC said, variables which contain spaces or special chars should be within quotes.

i tail the log and grep

Code:

FE_get_pool_threshold_congestion | percent: 0%

if % is increased by 1 e.g 1% i want to restart process the process

tells us absolutely nothing about what is contained in the variable res in your script. We can easily state that if you effectively have done the assignment:

Code:

res="FE_get_pool_threshold_congestion | percent: 0%"

then the test:

Code:

if [ "$res" != "percent: 0%" ]
then    echo "restart some process"
fi

will ALWAYS print restart some process if you're using a shell that is based on Bourne shell syntax.

The code you supplied could behave the same as the code shown above, give a syntax error, or do various other things depending on how res was set, what shell you're using, and what operating system you're using.