Linux-command details

Command details this article address: http: blogcsdnnetcaroline_wendyar command (command) details

Address: http://blog.csdn.net/caroline_wendy/article/details/22663081

Test Environment: Ubuntu 12.04 + GNOME Terminal 3.4.1.1

In Linux, commands mainly include four types:Executable program (executable program),Shell built-in commands (builtin),Shell functions),Alias command (alias);

Type:Display the command type. Format: type command

Which:Display the executable program location. Format: which command. only functions can be displayed. the built-in commands are empty (ubuntu );

Help:The help document is displayed. the format is help command. Note: When the help cd is used, the vertical bars ("|") represent mutually exclusive options;

Help option (-- help ):Displays commands and related parameters. Format: command -- help;

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