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Commands and references ( GNU / linux kernel 2.4.18-3 and 2.4.18-14 )   
Linux is a registered trademark of Linus Torvalds

The commands with their most common usage are in brackets like this: [ command ].
Don't type the brackets, just what is inside of them.

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file space usage estimate
show amount of space files and directories take up on disk [ du -a -h ]
show amount of space directories take on disk [ du -h ]

[ ls -la -h ] will show files and their sizes in kilobytes.
[ ls -al -b ] will show files and their sizes in bytes.

There are many options to these commands. those listed above together have over 50 options. It is strongly recommended becoming familiar with the manual. If you do not have the man pages on your system, it would probably be a good idea to install them. For example, typing [ man du ] will show you the options for that command.

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