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			This option, often used with only a lonely dash, allows to "simulate a login". For now, it just changes the current directory to the home of the new user.
		
			
				
	
	
	
	
		
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Name
su - switch to another user
Synopsis
$ su [-] <user>
Description
su: Switch to another user.
When called with no user-specified, su defaults to switch to the root user. Need to enter the password if the user switch to has one.
Options:
- -,- -l,- --login: Start the shell as it was a real login
Arguments
- user: User to switch to (defaults to the user with UID 0)
Examples
Switch to root user
$ su
Switch to another user
$ su nona