Man Utility: Functions and installation

The man utility (from English manual - manual) is a command utility in the Unix operating system and its derivatives, which provides the user with access to manuals for using various commands and programs installed on the system.

What the utility can do

Man allows you to view the manuals in three different sections:

1. Section 1 contains manuals on general-purpose commands.
2. Section 2 contains guides on system calls and kernel functions.
3. Section 3 contains guides on library functions.

To use man, you need to know the name of the command or program for which you need to get the manual. For example, to get the ls command manual, you need to enter the command "man ls". The manual will be displayed in the terminal window. Man also supports keyword search and the ability to redirect output to a file or print.

How to install

man is usually already installed on most Linux and Unix distributions. If it is not installed, then you can install it using the package manager of your operating system.

In Ubuntu or Debian, you can install man using the following command:

In CentOS or Fedora, you can install man using the following command:

After installing man, you can use the "man" command in the terminal to view the manuals.