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Command for finding process using too much CPU

Command for finding process using too much CPU   Try doing this : top - b - n1 - c   And if you want the process that takes the most %CPU times : top - b - n1 - c | awk '/PID *USER/{print;getline;print}' or top - b - n1 - c | grep - A 2 '^$'       Or using a few other utils you could do: ps aux | sort - rk 3 , 3 | head - n 5   Change the value of head to get the number of processes you want to see.
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User account Lock/Unlock / Disable and enable

User account Lock/Unlock / Disable and enable Ex - Username - testing Lock command =---------- passwd -l testing or usermod -L testing unlock command ================= passwd -u testing or usermod -U testing Disable and Enable ==================== The following will lock an account Code: passwd -l testing You could also change the users shell to /bin/false if you don't want them to log in Code: usermod -s /bin/false testing Enable the account usermod -s /bin/bash tesing
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Ntp Time update

Ntp Time update --------------------------- "yum install ntp" (or is it "yum install ntpd").   In my opinion, if you see the TIME DRIFT messages, feel free to run one of the following commands: sudo /sbin/ntpdate server1.yoga.com
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