System Info – procinfo
procinfo gathers some system data from the /proc directory and prints it formatted on the screen.

Some of the information displayed is

Last Boot time
Load Average
average number of jobs running
number of runnable processes
total number of processes
PID of the last process run (idem)
Swap info
Memory resources
Number of disks
IRQ info
Installed modules (with the -a or -m option)
File Systems (with the -a or -m option)
To automatically update the displayed info every 30 seconds

yum install procinfo

procinfo -fn30

sync; echo 3 > /proc/sys/vm/drop_caches

Writing to this will cause the kernel to drop clean caches, dentries and inodes from memory, causing that memory to become free.
This is a non-destructive operation, and dirty objects are not freeable, the user should run “sync” first in order to make sure all cached objects are freed

export EDITOR=nano

http://www.ahinc.com/linux101/status.htm

http://linux.about.com/od/linux101/l/blnewbie5_5.htm

http://www.codecoffee.com/tipsforlinux/articles/22.html

df -h