Howto switch / chage user id witin a bash script to execute commands in the same script?

Posted by a1an on Super User See other posts from Super User or by a1an
Published on 2012-08-30T09:07:04Z Indexed on 2012/08/30 9:41 UTC
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Is there a way to switch user identity within a script (executed as root as part of an installation process) to execute some commands without calling an external sctipt, then be back to root to run other commands?

Sort of:

#!/bin/bash
some commands as root
SWITCH_USER_TO user
some commands as user including environment variables checks, without calling an external script
SWITCH_USER_BACK
some other stuff as root, maybe another user id change...

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