RHCSA Exam Study Guide with Complete Solutions | New Update
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Module
RHCSA
Institution
RHCSA
RHCSA Exam Study Guide with
Complete Solutions | New Update
systemctl list-units --type=target - Answer️️ -View all active targets on the
system.
systemctl list-units --type=target --all - Answer️️ -View all targets
installed on the disk.
systemctl get-default - Answer️️ -Display ...
systemctl is-enabled httpd - Answer✔️✔️-Determine if the httpd service is
enabled
systemctl list-unit-files --type=service --all - Answer✔️✔️-View enabled and
disabled settings for all units of the type "service"
systemctl list-units --type=service --all - Answer✔️✔️-List all service unit
configuration files, whether they are active or not
systemd.unit=rescue.target - Answer✔️✔️-Change the Boot Target
shutdown +5 shutdown messages goes here - Answer✔️✔️-Using the
shutdown command, schedule a shutdown for five minutes from now and
notify all users on the system of the shutdown
shutdown -r now - Answer✔️✔️-Using the shutdown command, reboot the
machine immediately without delay.
systemctl halt - Answer✔️✔️-Using systemctl, shutdown the system.
shutdown 01:00 - Answer✔️✔️-Schedule the system for a shutdown at 1:00
A.M. in the morning.
shutdown -c - Answer✔️✔️-Cancel the scheduled shutdown.
systemctl reboot - Answer✔️✔️-Using systemctl, reboot the the system.
init 0 - Answer✔️✔️-Using any method of your choice, power off the system.
pkill -t pts/0 - Answer✔️✔️-kill all of the "user" user's processes
pgrep -u user
pkill -u user ssh - Answer✔️✔️-Find all running processes left, which should
either be Bash or SSH and kill it
nice -n -20 httpd - Answer✔️✔️-Start the httpd service with the most
favorable nice possible.
ps axo pid,comm,nice | grep httpd
ps axo pid,comm,nice --sort=-nice | grep httpd - Answer✔️✔️-View the
current nice of the httpd service using the ps command and grep command
together.
renice -n 0 $(pgrep httpd) - Answer✔️✔️-Renice all httpd processes and set
the nice level to 0
uptime - Answer✔️✔️-View the system uptime and load average.
w - Answer✔️✔️-View the system uptime and load average in such a way
that it also shows what users are logged in to the system and what the user
is doing.
grep "model name" /proc/cpuinfo | wc -l - Answer✔️✔️-Using the proc file
system and wc, display the number of processors your system has. This is
important to calculate the load average of the system.
grep "model name" /proc/cpuinfo | wc -l
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