Manual pages are software documentation found in Unix like Operating system and man linux distro. To get the information about package and command, we use the syntax yum install Package_name-Command_name.The abbreviation of Manual Page is man page . When you work in Unix like operating system,we generally need help and information about the package and commands.In this case man page of command or software helps you.

So here, we will discuss about the error message man command not found in CentOS and Red Hat .

Generally we see this error,when you do minimal installation of operating system because of which man command is not installed.

To solve this problem,run the below given command

yum install man

Below given is the reference from my system when we run the command yum install man

[root@localhost ~]# yum install man
Loaded plugins: fastestmirror
base                                                                         | 3.7 kB     00:00     
base/primary_db                                                              | 4.4 MB     00:09     
extras                                                                       | 3.4 kB     00:00     
extras/primary_db                                                            |  19 kB     00:02     
updates                                                                      | 3.4 kB     00:00     
updates/primary_db                                                           | 1.3 MB     00:03     
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package man.x86_64 0:1.6f-32.el6 will be installed
--> Processing Dependency: lzma for package: man-1.6f-32.el6.x86_64
--> Running transaction check
---> Package xz-lzma-compat.x86_64 0:4.999.9-0.3.beta.20091007git.el6 will be installed
--> Processing Dependency: xz = 4.999.9-0.3.beta.20091007git.el6 for package: xz-lzma-compat-4.999.9-0.3.beta.20091007git.el6.x86_64
--> Running transaction check
---> Package xz.x86_64 0:4.999.9-0.3.beta.20091007git.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

====================================================================================================
 Package                Arch           Version                                   Repository    Size
====================================================================================================
Installing:
 man                    x86_64         1.6f-32.el6                               base         263 k
Installing for dependencies:
 xz                     x86_64         4.999.9-0.3.beta.20091007git.el6          base         137 k
 xz-lzma-compat         x86_64         4.999.9-0.3.beta.20091007git.el6          base          16 k

Transaction Summary
====================================================================================================
Install       3 Package(s)

Total download size: 416 k
Installed size: 886 k
Is this ok [y/N]: y
Downloading Packages:
(1/3): man-1.6f-32.el6.x86_64.rpm                                            | 263 kB     00:00     
(2/3): xz-4.999.9-0.3.beta.20091007git.el6.x86_64.rpm                        | 137 kB     00:00     
(3/3): xz-lzma-compat-4.999.9-0.3.beta.20091007git.el6.x86_64.rpm            |  16 kB     00:00     
----------------------------------------------------------------------------------------------------
Total                                                               437 kB/s | 416 kB     00:00     
warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
Importing GPG key 0xC105B9DE:
 Userid : CentOS-6 Key (CentOS 6 Official Signing Key) 
 Package: centos-release-6-5.el6.centos.11.1.x86_64 (@anaconda-CentOS-201311272149.x86_64/6.5)
 From   : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
Is this ok [y/N]: y
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : xz-4.999.9-0.3.beta.20091007git.el6.x86_64                                       1/3 
  Installing : xz-lzma-compat-4.999.9-0.3.beta.20091007git.el6.x86_64                           2/3 
  Installing : man-1.6f-32.el6.x86_64                                                           3/3 
  Verifying  : xz-lzma-compat-4.999.9-0.3.beta.20091007git.el6.x86_64                           1/3 
  Verifying  : man-1.6f-32.el6.x86_64                                                           2/3 
  Verifying  : xz-4.999.9-0.3.beta.20091007git.el6.x86_64                                       3/3 

Installed:
  man.x86_64 0:1.6f-32.el6                                                                          

Dependency Installed:
  xz.x86_64 0:4.999.9-0.3.beta.20091007git.el6                                                      
  xz-lzma-compat.x86_64 0:4.999.9-0.3.beta.20091007git.el6                                          

Complete!
[root@localhost ~]# 

After installation, check the command again. for eg.

man ls

You will see there is no more error message “man command not found”