find

Usage: find [PATH]... [EXPRESSION]

Search for files in a directory hierarchy. The default PATH is the current directory; default EXPRESSION is '-print'.

EXPRESSION may consist of:

			-follow		Dereference symbolic links
			-name PATTERN	File name (leading directories removed) matches PATTERN
			-type X		Filetype matches X (where X is one of: f,d,l,b,c,...)
			-perm PERMS	Permissions match any of (+NNN); all of (-NNN); or exactly (NNN)
			-mtime TIME	Modified time is greater than (+N); less than (-N); or exactly (N) days
		

Example:

			$ find / -name /etc/passwd
			/etc/passwd