ls - list. Similar to dir in dos. However ls doesn't do much unless command line switches are used.

• -a include hidden files
• -d name of current directory
• -F end directory names with /
• -i print the inode number
• -l (lowercase L) make a long listing
• -R list subdirectories
• -t sort by time

dir [opetions] [file(s)]

List file information of a directory. The default is the current directory. This is a list of some of the commandline switches. See the Man Page for all options.

-a	--all	List all files including hidden files (those that begine with a .
-A	-almost-all	List all files except . and ..
	--author	Used with long listing (l), prints the author of the file.
-B	--ignore-backups	Don't list files that end in a tilde (~).
-C		List files by column
	--color[=auto]	Colorize output; always, never or auto
-d	--directory	List directories instead of files. Does not dereference symlinks
	--group-directories-first	Group directories before files. Does not work with -sort(none) or -U
-i	--inode	Print the inode index number of each file.
-l		Use long list format
-n	--numeric-uid-gid	Long list with user and group ids
-o		Long list with no group information
-p	--indicator-style-slash	Append a / at the end of directory names
-r	--reverse	Reverse the order when sorting
-R	recursive	List sub directories recursivly
-t		Sort by modification time
-help		Produce a help screen with all opetions

Exit Status:

• 0 - All is good.
• 1 - Problems
• 2 - Big Problems

locate "[filename]" find "[filename]"""

To finde a particular file on the system use...

-b	--basename	match only the base name of path names
-c	--count	only print number of found entries
-d	--database DBPATH	use DBPATH instead of default database (which is /var/lib/mlocate/mlocate.db)
-e	--existing	only print entries for currently existing files
-L	--follow	follow trailing symbolic links when checking file existence (default)
-h	--help	print this help
-i	--ignore-case	ignore case distinctions when matching patterns
-l	--limit	-n LIMIT limit output (or counting) to LIMIT entries
-m	--mmap	ignored, for backward compatibility
-P	--nofollow	-H don't follow trailing symbolic links when checking file existence
-0	--null	separate entries with NUL on output
-S	--statistics	don't search for entries, print statistics about each used database
-q	--quiet	report no error messages about reading databases
-r	--regexp REGEXP	search for basic regexp REGEXP instead of patterns
	--regex	patterns are extended regexps
-s	--stdio	ignored, for backward compatibility
-V	--version	print version information
-w	--wholename	match whole path name (default)

...or...