sudo
CautionRun as superuser
sudo <command>
Runs one command as root. -i opens a root shell; -u runs as another user. Policy lives in sudoers.
Examples
sudo systemctl restart nginxRestart a service as rootsudo -iOpen a root shell
Syntax
sudo [-i] [-u user] <command>
Before you run it
Mistakes affect the whole system.
The same reference, with no signal at all
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