Linux run process in BG

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Hello All,

Following is my code;

echo "Enter time"
read fname1

sleep fname1 &

echo "have a nice day"

I need to sleep this process for such amount of time which taken from user (fname1) in background. when I try using above code it didn't execute properly. It skips the sleep and background.

Could you please help me to solve this.

Thank you.

Posted 21-Oct-13 4:32am

Strider87

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Sergey Alexandrovich Kryukov 21-Oct-13 10:50am

This is a wrong approach because you cannot guarantee that any particular amount of time, because OS is not a real-time one.
You can hope for help is you explain your purpose.
—SA

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Andreas Gieriet · Answer 1 · 2013-10-21T05:00:00

The task sounds non-sense to me.
Running a process in background means:
the stell starts that command as background process (fire and forget) and immediately continues with the next command.

I.e. this completes instantly:

sleep 100 &
echo "done"

You may observe the sleep process by running the ps command.
Cheers
Andi

PS: In your case, the "in background" is non-sense. Leave away the &.
PPS: If you want the sleep and the echo go into one background process, do this:
read -p "Enter seconds: " sec; (sleep $sec; echo "have a nice day") &.