Run three shell script simultaneously

Question

I have three shell script which I am running as below-

sh -x script1.sh

sh -x script2.sh

sh -x script3.sh

So each script is executed sequ

Answer 1

With GNU Parallel you can do:

parallel sh -x ::: script1.sh script2.sh script3.sh

If the scripts are executable then you can even do:

parallel ::: script1.sh script2.sh script3.sh

Watch the intro videos to learn more: https://www.youtube.com/playlist?list=PL284C9FF2488BC6D1

10 seconds installation:

$ (wget -O - pi.dk/3 || lynx -source pi.dk/3 || curl pi.dk/3/ || \
   fetch -o - http://pi.dk/3 ) > install.sh
$ sha1sum install.sh | grep 67bd7bc7dc20aff99eb8f1266574dadb
12345678 67bd7bc7 dc20aff9 9eb8f126 6574dadb
$ md5sum install.sh | grep b7a15cdbb07fb6e11b0338577bc1780f
b7a15cdb b07fb6e1 1b033857 7bc1780f
$ sha512sum install.sh | grep 186000b62b66969d7506ca4f885e0c80e02a22444
6f25960b d4b90cf6 ba5b76de c1acdf39 f3d24249 72930394 a4164351 93a7668d
21ff9839 6f920be5 186000b6 2b66969d 7506ca4f 885e0c80 e02a2244 40e8a43f
$ bash install.sh

Answer 2

The & allows a process to run in the background.

sh -x script1.sh &
sh -x script2.sh &
sh -x script3.sh &

Answer 3

you want this?

$ sh -x script1.sh & sh -x script2.sh & sh -x script3.sh &

Update explanation :

• Run each script in background mode so that next command is run without waiting for current command to complete.
• '&' makes the scripts run in background so that prompt does not wait for it to complete
• '&' also can be used to chain commands on one line similar to running commands one by one on command line.

Answer 4

Not sure what you are trying to accomplish but you can create a script that calls these 3 or send them to background by adding a "&" at the end.

sh -x script1.sh &
sh -x script2.sh &
sh -x script3.sh &