How to get help in Linux

How to get help in Linux

1. query steps:

1. Command -- help

2. man command to query

You can search by "/+ keyword;

Man-k keyword search for help documents containing keywords;

3. info command to be queried

You can search by "/+ keyword;

4. Google Algorithm

5. Most programs have corresponding help documents and save them in the/usr/share/doc folder.

2. man document type:

Column:

Enter man and the command "man ls" to query, as shown in figure

In LS (1), 1 indicates that the ls command is man document type = User Commands

The man document type is parsed as follows: (I obtained from the input command "man)