BASH Scripting, su to www-data for single command
Solution 1
Just use su - www-data -c 'svnadmin create /svn/repository'
in your script run by root. So that only this command is run by www-data user.
Update for future viewers:
In case you receive a "This account is currently not available"
error, consider using:
su - www-data -s /bin/bash -c 'svnadmin create /svn/repository'
( @Petr 's valuable mention about -s
flag to accommodate www-data
user's no login policy )
Solution 2
With 'su' is probably that request a password, and www-data doesn't have password. I recommend the command sudo
:
sudo -u www-data command
The condition is that your user must be root, or configurated in the sudoers file
Solution 3
2 Possible approaches:
1) sudo
command:
In most cases you will have access to the sudo
command and so the solution is simply:
sudo -u target_user target_command
2) su
command (if sudo not installed. Ex. alpine-linux images
):
su - target_user -c 'target_command'
In case you receive a 'This account is currently not available' error, the user has a no login (shell access) policy in effect. If so, consider using:
su - target_user -s /bin/bash -c 'target_command'
(Based on @Petr 's valuable comment about -s
flag to accommodate www-data
user's no login policy)
Solution 4
Use su
:
su [options] [username]
The options which apply to the su command are:
-c, --command COMMAND
Specify a command that will be invoked by the shell using its -c.
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Brendon Dugan
Updated on September 18, 2022Comments
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Brendon Dugan almost 2 years
I am working on automating the creation of subversion repositories and associated websites as described in this blog post I wrote. I am running into issues right around the part where I su to the www-data user to run the following command:
svnadmin create /svn/repository
There is a check at the beginning of the script that makes sure it is running as root or sudo, and everything after that one command needs to be run as root. Is there a good way to run that one command as www-data and then switch back to root to finish up?
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Brendon Dugan about 12 yearsYeah, it appears I forgot a basic rule of scripting... RTFM. Thanks!
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rubo77 over 8 yearsTrying this, I get the error
This account is currently not available.
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Andrew over 8 yearsI also get this error, but futbolsalas15's answer below works fine.
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Petr over 8 yearsUse
su - www-data -s /bin/bash -c 'your_command'
to make this work. User www-data has shell/usr/sbin/nologin
so without the-s
parameter it leads to the error message. -
Frantumn about 7 yearsIt should be noted that su commands don't work with accounts that have disabled logins (such as www-data). You'll have to use sudo.
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Captain Hypertext over 6 yearsWow, why isn't this the selected answer? Took me way too long to find this.
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Jared over 3 yearsthe
sudo -u www-data target_command
version worked for me, thanks! -
Michael J over 2 yearsYes, this is the easiest approach to running a command as www-data user. Thanks!