How to view colored man pages in Linux

Edit the ~/.bashrc, run:
$ vi ~/.bashrc
Append the following code to get coloured manual pages with less command:

man() {
    LESS_TERMCAP_md=$'\e[01;31m' \
    LESS_TERMCAP_me=$'\e[0m' \
    LESS_TERMCAP_se=$'\e[0m' \
    LESS_TERMCAP_so=$'\e[01;44;33m' \
    LESS_TERMCAP_ue=$'\e[0m' \
    LESS_TERMCAP_us=$'\e[01;32m' \
    command man "$@"
}

A Note About Colored Man Pages On xterm or rxvt-unicode

If you are using xterm/uxterm or rxvt-unicode edit the ~/.Xresources or ~/.Xdefaults file, enter:
$ vi ~/.Xresources
OR
$ vi ~/.Xdefaults
Xterm user add:

*VT100.colorBDMode:     true
*VT100.colorBD:         red
*VT100.colorULMode:     true
*VT100.colorUL:         cyan

rxvt-unicode user add:

URxvt.colorIT:      #87af5f
URxvt.colorBD:      #d7d7d7
URxvt.colorUL:      #87afd7

Save and close the file. Type the following command:
$ xrdb -load ~/.Xresources
OR
$ xrdb -load ~/.Xdefaults
To view the man page of grep command, enter:
$ man grep
Sample outputs: