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    ps aux # Lists all running processes.
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.0 168800 10944 ?        Ss   Jun12   0:02 /sbin/init
root         2  0.0  0.0      0     0 ?        S    Jun12   0:00 [kthreadd]
root         3  0.0  0.0      0     0 ?        I<   Jun12   0:00 [rcu_gp]
root         4  0.0  0.0      0     0 ?        I<   Jun12   0:00 [rcu_par_gp]
...
    journalctl -u service_name # Views logs for a specific service.
    kill -9 process_id # Forces termination of a process.
    nice and renice # Adjusts process priority.