问题
I'm writing an init script which is supposed to execute a single command as a user different than root. This is how I'm doing it currently:sudo -u username command
This generally works as expected on Ubuntu/Debian, but on RHEL the script which is executed as the command hangs.
Is there another way to run the command as another user?
(Note that I can't use lsb init functions as they're not available on RHEL/Centos 5.x.)
回答1:
On RHEL systems, the /etc/rc.d/init.d/functions script is intended to provide similar to what you want. If you source that at the top of your init script, all of it's functions become available.
The specific function provided to help with this is daemon. If you are intending to use it to start a daemon-like program, a simple usage would be:
daemon --user=username command
If that is too heavy-handed for what you need, there is runuser (see man runuser for full info; some versions may need -u prior to the username):
/sbin/runuser username -s /bin/bash -c "command(s) to run as user username"
回答2:
For systemd style init scripts it's really easy. You just add a User= in the [Service] section.
Here is an init script I use for qbittorrent-nox on CentOS 7:
[Unit]
Description=qbittorrent torrent server
[Service]
User=<username>
ExecStart=/usr/bin/qbittorrent-nox
Restart=on-abort
[Install]
WantedBy=multi-user.target
回答3:
If you have start-stop-daemon
start-stop-daemon --start --quiet -u username -g usergroup --exec command ...
回答4:
Instead of sudo, try
su - username command
In my experience, sudo is not always available on RHEL systems, but su is, because su is part of the coreutils package whereas sudo is in the sudo package.
回答5:
I usually do it the way that you are doing it (i.e. sudo -u username command). But, there is also the 'djb' way to run a daemon with privileges of another user. See: http://thedjbway.b0llix.net/daemontools/uidgid.html
来源：https://stackoverflow.com/questions/17956151/how-to-run-a-command-as-a-specific-user-in-an-init-script