Linux Command List in Alphabet order

• mount

  	also see unmount
  	mount floppy disk
  	mount /dev/fd0  (must be root)
  		location of floppy disk is /mnt/floppy
  

• shutdown

  	shutdown -h now  (must be root)
  	
  	shutdown option time
  	options	-h: halt
  	time	now: now
  		10: 10 minutes later
  	
  	shutdown from not root
  	chmod u+s /sbin/shutdown
  	then shutdown command
  

• startx

  	start xwindow
  

• su

  	su -
  	switch from a user account to root
  	
  	su - (user name)
  

• ulimit

  	change the capacity of numerical calculation
  	ulimit -d (number)  500000 is big enough		
  

• unmount

  	unmount floppy disk
  	umount /dev/fd0