Posted by : JAKIR HUSSAIN


Monitoring , Linux System, top, vmstat, w, uptime, ps, free, iostat, sar, mpstat

The Linux command line is a handy little resource that lets you do a lot with ease. You can of course argue that there are far too many commands to remember, however, the truth is their tremendous functionality speaks for themselves.

1.top

Provides real-time report of the actual process activity. By default it details the most CPU-intensive tasks.

 

2.vmstat

Reports virtual memory statistics.

3.w

Displays info about the currently logged in users and their processes.

4.uptime

Reports the amount of time the server has been running, current time, number of users currently logged on and the system load average.

5.ps

Displays a snapshot of the current processes.

6.free

Displays the total amount of physical and swap memory in the system and the buffers used by the kernel.

7.iostat

Displays the CPU and input/output statistics for devices, partitions and network filesystems (NFS).

8.sar

Collects, reports and saves system activity info.

9.mpstat

Displays each available processor’s activities.

10.pmap

Reports the memory map of a process.

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