RHCSA RHEL 8 - Log in and switch users in multiuser targets
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This video is based on RHEL 8.
Video to cover the section 'Boot, reboot, and shut down a system normally' for the RHCSA (Red Hat Certified System Administrator).
More information on the required learning: https://www.redhat.com/en/services/tr...
Commands used in this video:
Get current run level:
runlevel
or
systemctl get-default
Overview of 6 runlevels.
runlevel 0 = Halt or shutdown system.
runlevel 1 = Single user mode.
runlevel 2 = Multiuser mode, without networking.
runlevel 3 = Full multiuser mode.
runlevel 4 = Currently unused.
runlevel 5 = X11 Display
runlevel 6 = Reboot system.
Run levels of 2 and above are multi-user.
Create a new user:
useradd user1
Switching user accounts:
Sign into user1 account:
su user1
Sign into user1 and gets user1's environment variables:
su - user1
Change to root:
su -
Show current user:
whoami
Password policy of an account:
chage -l user1
Update account password policy:
chage user1
Run a command as root:
sudo command