10 Command Line Tools to Monitor Linux Performance

**ccvv** · 06-04-2013, 03:23 AM

Monitor Linux Performance is very important but not many people think it is very simple with some easy command lines.

The true thing is this is the task you have to do daily to make sure your server down or at least monthly and of course when your server slow down. After a long time working with Linux I got a summary of these command line what can help you quickly reach to Linux Administrator to control the server performance quality.

1. Mornitor overral linux process with "top"

This command is very popular, it will help you display CPU usage, Memory usage, Buffer Size, Process PID, Cache Size, Swap Memory, User, Commands and more.

it 's quite simple, just simply type:

Code:

# top

It will show you something like this.

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It will show you the status of current server and update time-to-time. To get out of it, type "q".

2. List Open Files with "lsof"

You realize how it work when you see the name of it, it simply list all of opening files. It will show you which files make your HDD can't be unmount and you know how to do with it. Type it and you will see.

3. Network Packet Analyzer

Let 's type "vmstat" and you will see something like this:

Code:

root@localhost:~# vmstat
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 1  0  17116 180860  29356 365176    0    4   672    95  195  834  5  1 86  7

This action will show you I/O blocks, interrupts, CPU activity, virtual memory, kernerl threads, disks, system processes and more. It is very useful when you want to track these information quickly

4. Network Statistics with "netstat -a | more"

If you manage a server what have a lot of traffic you will want to know how much for imcome and outcome, this command will help you.

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5. Network Packet Analyzer with "tcpdump -i eth0"

One more command to track the package network to know how is it going with traffic of your server is "tcpdump -i eth0". Look at the screenshot below:

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