How to characterize stength of a server

In order to understand your server, what is its strenght, its OS version, how many cpu, here is a short list of commands that may help



free -m
             total       used       free     shared    buffers     cached
Mem:          3832       3605        226          0        375       1038
-/+ buffers/cache:       2192       1640
Swap:         4031        126       3905

In this case, we can see the server has about 4GB RAM .



top  (and then click on 1)

top - 18:26:24 up 169 days,  7:07,  3 users,  load average: 0.03, 0.08, 0.08
Tasks: 133 total,   1 running, 130 sleeping,   0 stopped,   2 zombie
Cpu0  :  2.9%us,  0.7%sy,  0.0%ni, 95.9%id,  0.5%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu1  :  1.4%us,  0.5%sy,  0.0%ni, 97.5%id,  0.6%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   3924684k total,  3658548k used,   266136k free,   380324k buffers
Swap:  4128760k total,   130752k used,  3998008k free,  1035372k cached

Here, we can see that we have 2 CPU (2 core) and still about 4 GB RAM


df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_root-lv_root
                       20G  5.1G   14G  27% /
tmpfs                 1.9G     0  1.9G   0% /dev/shm
/dev/sda1             146M   60M   79M  44% /boot
/dev/mapper/vg_root-lv_home
                      4.0G  137M  3.7G   4% /home
/dev/mapper/vg_root-lv_liveperson
                       28G  987M   26G   4% /liveperson
/dev/mapper/vg_root-lv_tmp
                      4.0G  143M  3.6G   4% /tmp

This command enables to understand the disk partition ... How many storage you have etc ,,,


cat /etc/issue
CentOS release 6.6 (Final)
Kernel \r on an \m

This last command shows you which OS you run on and what is its version.
Here, we use CentOS version 6.6 release.