Manual instructions: http: blogcsdnnetcaroline_wendyart manual (manual)
Address: http://blog.csdn.net/caroline_wendy/article/details/22664555
Environment: Ubuntu 12.04 + Gnome 3.4.1.1
1. man: displays the manual page of the program.
Executable files are generally provided with reference manuals (manual), which are divided into many parts;
You can specify part numbers (1-8) to indicate the specific meaning, mainly as follows:
1. user commands (generally include)
2. program interfaces called by the kernel system
3. C library function program interface
4. special files
5. file format
6. games and entertainment
7. Miscellaneous
8. system management commands
Note: not every command manual contains the above options;
Format: man program; man section search_term
2. apropos-display appropriate commands
Search for the manual list and display matched entries,Format: apropos word; You can also use:Man-k word;
3. info-display information (info) entries
The command line set of the command line program can be displayed. the command line of the GNU project is basically a part of the coreutils package and its information can be displayed;
Usage: info coreutils;
: