String comparison

Shell Programming and Scripting
1

hi team,

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

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

echo "restart some process"

fi
2

Please use code tags as required by forum rules!

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

3

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

4

i tail the log and grep

FE_get_pool_threshold_congestion | percent: 0%

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

5

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:

res="FE_get_pool_threshold_congestion | percent: 0%"

then the test:

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.