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Chapter III system installation and planning

Floppy Fd0,fd1, ...

HDD Hda,hdb, ...

SCSI HDD Sda,sdb, ...

The fourth Chapter Basic UNIX commands and knowledge

Ln-s prog.1.1 Prog establishing symbolic connections

> overwrites the contents of the destination file, and >> is added to the end of the destination file.

">" does not redirect the standard error output, so if you need the error message with ">&", only output the error message with "2>" (1: Standard output, 2: standard error Output)

Add "&" after program Start command, run in background, cancel background run with FG

Chown Change the file owner, CHGRP change the owning group (chown owner filename)

chmod symbol mode chmod UGO+WRX file name

chmod absolute mode, just remember the following figure: (So 777 open all permissions)

The fifth chapter basic System Management

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