SYS: Boot, reboot, and shut down a system normally.

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Switch on a physical server or a virtual machine (in this case, type: # virsh start vm).
Connect to the console.

To reboot the system, choose one command among these:

# reboot
# shutdown -r now
# init 6

To shutdown the system, choose one command among these:

# shutdown -h now
# init 0

To switch off the system, choose one command among these:

# halt
# poweroff

To get the current run level, type:

# runlevel

To change the current run level (where X is the new run level), type:

# init X
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RHCSA7: Task of the day

Allowed time: 10 minutes.
Archive and compress the content of the /opt directory (create files if none exists).
Uncompress and unarchive the resulting file in /root

RHCE7: Task of the day

Allowed time: 5 minutes.
Set up time synchronization with default configuration.

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