linux commands

一、commands

    #sudo su -     ---------to switch to the super rights

 

    # ls -l * |grep "^-"|wc -l ---- to count files
　  # ls -l * |grep "^d"|wc -l ----- to count dir

 

    #du -sk ./log   : display units  -sum kB  --------to sum the size of the folder "./log" (use the unit of kB )

    #du -sh ./log   : directly give the size (k,m,G)

 

    #ps -ef |grep java -----------to list all java related file and info

 

    #ll ------------to list the detailed info of all file in the current folder

    #ll -f  ----------to list the files by the modify time, the last one is the newest

 

    #stat filename  --------------to look at the detailed info of the file

 

     #vim

        esc 

        :q    -----------just exit

        :q!   -----------exit without save

        :wq -----------exit  and save

 

二、websites

find the related linux commands :    

http://linux.about.com/library/cmd/blcmdl1_diff.htm