In our use Linux When you order , How do you know what options are available under this command ?
( One ) command --help
It's usually Linux Self contained help information .
as ls --help .
( Two )man ( something the matter , Looking for a man manual)
man yes linux A manual provided , Contains most of the commands , Function instructions .
The manual is divided into many chapters , use man You can specify different chapters to browse . example :man ls .
man The chapters in (section) The meaning is as follows :
1.Standard commands ( Standard command )
2.System call ( system call )
3.Library function( Library function )
4.Special devices( Description of equipment documents ,/dev Under the various equipment )
5.File formats( file format , as passwd)
6.Games and toys( Games and entertainment )
7.Miscellaneous( miscellaneous , Convention and agreement, etc , for example Linux Archives system , Network protocol )
8.Adminstrative commands( Administrator command , as ifconfig)
man The search is carried out according to the chapter number of the manual .
man The following function keys are set :
(3) Automatic completion
When you type the first few letters of a command , Press tab key , The system will automatically complete the order for us . notes : The command needs to be uniquely determined .
(4) Historical command
When the system executes some commands , You can press up and down to view previous commands ,history List the commands that have been executed . Drive in as shown in the figure below history after , Display from 1 All the way to 999 Orders , The screenshot is part , Enter after !996
, It shows home List under folder .
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