User Manual in Linux
man command in Linux is used to display the user manual of any command that we can run on the terminal. It provides a detailed view of the command which includes NAME, SYNOPSIS, DESCRIPTION, OPTIONS, EXIT STATUS, RETURN VALUES, ERRORS, FILES, VERSIONS, EXAMPLES, AUTHORS AND SEE ALSO.
- Every manual is divided into the following sections:
- Executable programs or shell commands
- System calls (functions provided by the kernel)
- Library calls (functions within program libraries
- Games
- Special files (usually found in /dev)
- File formats and conventions eg /etc/passwd
- Miscellaneous (including macro packages and conventions), e.g. groff(7)
- System administration commands (usually only for root)
- Kernel routines [Non-standard]
1. No Option: It displays the whole manual of the command.
Syntax :
2. Section-num: Since a manual is divided into multiple sections so this option is used to display only a specific manual.
Syntax :
Example:
In this example, the manual pages of command %u2018intro%u2018 are returned which lies in section 2.
3. -f option: One may not be able to remember the sections in which a command is present. So this option gives the section in which the given command is present.
Syntax:
Example:
4. -a option: This option helps us to display all the available intro manual pages in succession.
Syntax:
Example:
In this example you can move through the manual pages(sections) i.e either reading(by pressing Enter) or skipping(by pressing ctrl+D) or exiting(by pressing ctrl+C).
5. -w option: This option returns the location in which the manual page of a given command is present.
Syntax:
Example:
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