Getting Started with Linux-getting help

Get help

In the production of learning will always appear you do not use the command, do not know the file, we have some help to solve these problems, first Linux in the 4 help command Whatis, helper, man, info

Whatis

This command is relatively low, can only simply explain what the command is, as to what usage, what requirements are all unknown, but this command is based on database lookup, fast

Help

As stated in the previous blog, commands are divided into internal shall commands and external commands (two distinctions are described in detail earlier)

For internal commands: Help command

External command: Command Help

The help command reads poorly (jumps directly to the last side), although there are command usages but not detailed, and not every command has Help

And help can only be used to get commands, and if you want to know what a file is for, it's not going to work.

Info

The path to the Info command/file (the file is unique and does not require a path)

Info is so powerful that you can basically find all the information you want to know, and there are examples in the use of commands, but not reading, too much information.

Mans

These three are all unreliable, only "men" Live, Man (Mansual)

The path to the man command/file (the file is unique and does not require a path)

Man has 9 major chapters.

1: User Command 2: System call 3:C Library call

4: Equipment files and special files 5: Configuration file Format 6: Game

/em> < EM id= "__mcedel" > 7: Miscellaneous                       &NBSP ;               8: Commands for Management classes                        /em> 9:linux kernel api 

You can select different options to view related files

Meanwhile, man supports Chinese installation under CENTOS7.

Add a line that reads as follows MANDATORY_MANPATH/USR/SHARE/MAN/ZH_CN

Then use man-a ls query, Q quit the English version, and then enter

Other

When the help provided by the system is not resolved, we can only resort to the perimeter

Blog

Developer community

WWW.baidu.com

www.google.cn

Getting Started with Linux-getting help