| 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.
