Monitoring the system

Basic command line:

pstree	Processes and parent-child relationships
top	Show top processes
iostat	Report CPU statistics and input/output statistics for devices and partitions.
ps -auxw	process status
uname -a	print system information
cat /proc/version	Display Linux kernel version in use.
cat /etc/redhat-release	Display Red Hat Linux Release. (also /etc/issue)
uptime	Tell how long the system has been running. Also number of users and system’s load average.
w	Show who is logged on and what they are doing.
/sbin/lsmod	List all currently loaded kernel modules. Same as cat /proc/modules
/sbin/runlevel	Displays the system’s current runlevel.
hostname	Displays/changes the system’s node name. (Must also manually change hostname setting in/etc/sysconfig/network. Command will change entry in /etc/hosts)
service	Red Hat/Fedora command to display status of system services. Example: service --status-all Help: service --help

GUI/Graphical:

gnome-system-monitor	Operating system monitor and usage graphing.
gkrellm	Graphical system monitor. (Additional RPM package: gkrellm)
ps3	3D load meter. Very cool 3-D graphics.
xosview	Operating system monitor: load, memory, swap, net, disk, …

List of tools:

• tools for finding the status of your system

Sumber : http://www.yolinux.com/TUTORIALS/