Linux command – sudo

root@r1 [/var/log]# sudo -u nobody sh -c "whoami"

root@r1 [/var/log]# sudo -u nobody sh -c "tail yum.log"
Sep 30 01:17:38 Updated: net-snmp-libs 5.0.9-2.30E.19.i386
Sep 30 01:17:38 Updated: net-snmp-devel 5.0.9-2.30E.19.i386

root@r1 [/var/log]# man sudo
sudo allows a permitted user to execute a command as the 
superuser or another user, as specified in the sudoers file....

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