Three methods for using help in CentOS

Three methods for using help in CentOS

1. Three ways to use help:

Command -- help

Man command

Info command

2. Differences:

-- Help, fast and efficient

Man, summary

Info, complete, detailed

** Usually, -- help and man are used.

Eg:

Whatis, whatis database. After the system is installed, it is created by makewhatis. After the system is installed, it is generated at a.m. on the same day. You can also manually execute the makewhatis command to create it.

Makewhatis collects all the index information on the help manual page and adds a line to the database, including the name and simple description on the manual page.

3. man is actually a series of compressed documents stored in/usr/share/man.

Operation:

Top/bottom pages: pageUp, pageDown

To the top/bottom: g/G

Exit: q

Search keyword:/keyword search next/Previous place by n/N

** Search by Keyword:

Man-k keyword

Man-K keyword (interactive view)

Eg:

To find ftp-related commands,

3. man is actually a series of compressed documents stored in/usr/share/man.

Operation:

Top/bottom pages: pageUp, pageDown

To the top/bottom: g/G

Exit: q

Search keyword:/keyword search next/Previous place by n/N

* Keyword-based search command:

Man-k keyword

Man-K keyword (interactive view)

Eg: