How to configure your Cisco Router using Minicom in Linux CLI

I will assume that you are using GNU/Linux systems (Ubuntu,Debian, CentOS etc.) to configure your CISCO router using CLI.
Open your terminal and install minicom and setserial by typing this command in the terminal.

Check your serial port

The output should be like this:

[   18.439952] console [tty0] enabled
[   20.172975] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
[   20.173725] 00:08: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

set your serial port

/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4

Start minicom and configure using this command

The minicom configuration

            +-----[configuration]------+
            | Filenames and paths      |
            | File transfer protocols  |
            | Serial port setup        |
            | Modem and dialing        |
            | Screen and keyboard      |
            | Save setup as dfl        |
            | Save setup as..          |
            | Exit                     |
            | Exit from Minicom        |
            +--------------------------+

Set your minicom configuration like this one

    +-----------------------------------------------------------------------+
    | A -    Serial Device      : /dev/ttyS0                                |
    | B - Lockfile Location     : /var/lock                                 |
    | C -   Callin Program      :                                           |
    | D -  Callout Program      :                                           |
    | E -    Bps/Par/Bits       : 9600 8N1                                  |
    | F - Hardware Flow Control : Yes                                       |
    | G - Software Flow Control : No                                        |
    |                                                                       |
    |    Change which setting?                                              |
    +-----------------------------------------------------------------------+

and save.

            +-----[configuration]------+                                     
            | Filenames and paths      | +-----------------------------------------+
            | File transfer protocols  | |Give name to save this configuration?    |
            | Serial port setup        | |> cisco                                  |
            | Modem and dialing        | +-----------------------------------------+
            | Screen and keyboard      |                    
            | Save setup as dfl        |                    
            | Save setup as..          |                    
            | Exit                     |                    
            | Exit from Minicom        |                    
            +--------------------------+                    

You can configure your CISCO router now, to exit minicom press CTRL+A then release and press Q or X.
Next time if you want to configure your CISCO router using console, you can just type this command.

Have fun!