How to run a command in the background and get no output

Question

I wrote two shell scripts a sh and b sh  In a sh and b sh I have a infinite for loop and they print some output to the terminal  I want to write another script which calls both a sh and b sh but I want the user to regain control of the terminal immediately  instead of having the script run infinitely and I want to hide the output in terminal

User · Answer

If they are in the same directory as your script that contains:

./a.sh > /dev/null 2>&1 &
./b.sh > /dev/null 2>&1 &

The & at the end is what makes your script run in the background.

The > /dev/null 2>&1 part is not necessary - it redirects the stdout and stderr streams so you don't have to see them on the terminal, which you may want to do for noisy scripts with lots of output.

User · Answer

Run in a subshell to remove notifications and close STDOUT and STDERR     amp  gt  dev null script sh  amp

User · Answer

nohup sh -x runShellScripts sh  amp

User · Answer

Use nohup if your background job takes a long time to finish or you just use SecureCRT or something like it login the server    Redirect the stdout and stderr to  dev null to ignore the output   nohup  path to your script sh  gt   dev null 2 gt  amp 1  amp

User · Answer

Sorry this is a bit late but found the ideal solution for somple commands where you don t want any standard or error output  credit where it s due  http   felixmilea com 2014 12 running-bash-commands-background-properly    This redirects output to null and keeps screen clear   command  amp  gt  dev null  amp

User · Answer

If you want to run the script in a linux kickstart you have to run as below    sh  tmp script sh  gt   dev null 2 gt  amp 1  lt   dev null  amp

User · Answer

These examples work fine   nohup sh prog sh proglog log 2  amp 1  amp   For loop you can use like this    for i in  1  10   do sh prog sh  sleep 1  done prog log 2  amp 1  amp   It works in background and does not show any output

User · Answer

Redirect the output to a file like this     a sh  gt  somefile 2 gt  amp 1  amp    This will redirect both stdout and stderr to the same file  If you want to redirect stdout and stderr to two different files use this     a sh  gt  stdoutfile 2 gt  stderrfile  amp    You can use  dev null as one or both of the files if you don t care about the stdout and or stderr    See bash manpage for details about redirections

[shell] How to run a command in the background and get no output?

Examples related to shell