How to lock & unlock multiple users in Linux
‘usermod’ & ‘passwd’ commands are used to lock or unlock one user account at a time, but you may need to write some small shell scripts to perform this action …
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How to Kill user sessions in Linux
Sometimes we might need to kill a user session in Linux based on requests, which can be done by sending SIGNALS with kill command. We need to send one of …
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How to become a ‘root user’ in Linux?
root user is a privileged user in Linux, which is similar to an administrator in Windows. All kind of administrative operations can be performed using root user privilege hence it …
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How to execute a command or script at reboot or startup
Well-known services in Linux can be added on boot time without any problems, because most of them come with their own script, which is done using ‘chkconfig’ and ‘systemctl’ commands. …
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How to verify if NTP sync is working on Linux?
NTP stand for Network Time Protocol, which synchronize the clock between computer systems over the network. NTP server keep all the servers in-sync with accurate time to perform time based …
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How to Enable (UP)/Disable (DOWN) Network Interface Port (NIC) in Linux?
In servers, Network interfaces either physical or virtual can be enabled or disabled by running some commands. If any change is performed in NIC due to which the interface is …
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How to find the Process ID of a program in Linux
When working on a Linux system, sometimes you need to figure out what processes are running and which PID or PPID is tied to it. It can be used for …
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How to get the size of a directory in Linux
It is very easy to check the size of directories and files in Linux using the GUI, but it is not always easy to get the size of a directory …
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Linux / Linux Administration / Linux Basic / Linux Commands / System Diagnostic Tool / system monitoring / System Performance Monitoring Tools
How to check running process in Linux
Many Linux commands can be used to view processes running on a Linux system. ‘ps’ and ‘top’ command are widely used by many Linux administrators to view running processes and …
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