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Excerpt: PS command   Ps command is included with procps rpm/package which will give you a list of the processes running on your system. With no options, ps will list processes that belong to the current user and have a controlling terminal.   Example options include:   −aux −−− list all running processes (by all users with some information). −a −−− list all processes from all users. −u −−− list more information including user names, %cpu usage, and %mem usage et cetera. −x −−− list processes without controlling terminals. −l −−− display different information including UID and nice value. −−forest −−− this makes it easier to see the process hierarchy   For example to….

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Excerpt: The pmap command (included with procps rpm packages) reports the amount of memory that one or more processes are using. You can use this tool to determine which processes on the server are being allocated memory and whether this amount of memory is a cause of memory bottlenecks and it is also very useful for the administrators to find which of the libary/file is eating more memory on that pid (use pidof <program-name> to find the list of pid )   # pmap <pid>   To show in device format.   # pmap -d <pid>   A sample screen-caps below.    

If you don’t have GUI installed and if you want to get your public ip address from Linux cli, just use the following commands :  

• # curl -s ip.appspot.com # lynx http://www.whatismyip.com