Slide 2.10: Built-in Unix shell commands

Slide 2.9: The Unix
Slide 2.11: Advanced Unix shell commands
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Built-in Unix Shell Commands

The shell is the Unix command interpreter used to pass commands to an operating system; so called because it is the part of the operating system that interfaces with the outside world.

/bin/date
The date command prints the date and time.

/bin/ls
The ls (“list”) command lists status information for files and directory contents.

/bin/pwd
The pwd (“print working directory”) command tells you where you are in the file system by printing the current working directory.

The following table lists some other common Unix shell built-in commands. For more shell commands, refer to the Unix shell command manual pages.

Command	Description
`man`	Finds and displays reference manual pages.
`cd`	Changes the current working directory.
`mkdir`	Makes directories
`chmod`	Changes the permissions mode of a file.
`more/page`	Browses or pages through a text file.
`cp`	Copies files
`mv`	Moves files.
`grep`	Search a file for a pattern.
`rm/rmdir`	Removes directory entries.