mjhjmtu

said i have looping script in file test.sh, i just want to running script "running_script2.sh" after the background process is complete, what i try like this, but it's not working .

for id in 1 2 3
do
bash running_script1.sh $id & (#complete 1 minute/looping)
done
wait
echo "running script2 ..."
bash running_script2.sh

its work when :

bash running_script1.sh 1 &
bash running_script1.sh 2 &
bash running_script1.sh 3 &
wait
echo "running script2 ..."
bash running_script2.sh

but its not efficient

There is no semantic difference between

for id in 1 2 3
do
bash running_script1.sh $id & (#complete 1 minute/looping)
done

and

bash running_script1.sh 1 &
bash running_script1.sh 2 &
bash running_script1.sh 3 &
wait
echo "running script2 ..."
bash running_script2.sh

This demonstration script below runs little over 3s (you can time it) regardless of whether the condition command is true or false:

#!/bin/sh -eu
for i in 1 2 3; do
 echo "sleep $i" > $i && chmod +x $i
done
if false; then
 for i in 1 2 3; do
 bash ./$i &
 done
else
 bash ./1 &
 bash ./2 &
 bash ./3 &
fi
wait

If you're still experiencing discrepancies, please post an mcve.

Don't know whether this is a right approach but I have used screen to run script

screen is a virtual terminal to run process in bg

for id in 1 2 3
do
screen -d -m bash script1.sh $id
done
wait
echo "running script2 ..."
bash script2.sh

screen -d -m will run the script and closes the screen after the script completes.

I cannot get the output of script1 in standard output while using screen so I used a file to store the output of script1.