MangoHost Blog / ssh: Command Examples, Scripts, Automation – Guide for Linux Administrators
ssh: Command Examples, Scripts, Automation – Guide for Linux Administrators

ssh: Command Examples, Scripts, Automation – Guide for Linux Administrators

SSH (Secure Shell) is a cryptographic network protocol that allows secure communication between two computers over an unsecured network. It provides a secure channel over an unsecured network by using encryption and authentication. SSH is widely used in the Linux world for remote administration, file transfer, and tunneling.

The SSH package in Linux provides the ssh command-line tool, which allows users to securely connect to remote servers and execute commands. It also provides tools for generating and managing SSH keys, which are used for authentication.

The official page for the SSH package in Linux can be found at

Programming Languages Used

The SSH package in Linux is primarily written in C programming language. It also uses some components written in other languages like Perl and Shell scripting.

Installation on Supported Operating Systems

The SSH package is usually pre-installed on most Linux distributions. However, if it is not installed, you can install it using the package manager specific to your distribution.


sudo apt-get install openssh-server


sudo yum install openssh-server

Arch Linux

sudo pacman -S openssh

SSH Commands Examples

1. Connect to a remote server

The most basic use of SSH is to connect to a remote server. You need to know the IP address or hostname of the remote server and have the necessary credentials to authenticate.

ssh username@remote_server

2. Copy files to/from a remote server

You can use SSH to securely copy files between your local machine and a remote server using the scp command.

scp local_file username@remote_server:destination_directory
scp username@remote_server:remote_file local_directory

3. Generate SSH key pair

SSH keys are used for authentication instead of passwords. You can generate an SSH key pair using the ssh-keygen command.

ssh-keygen -t rsa -b 4096 -C ""

Similar Packages and Benefits

There are several other packages available that provide similar functionality to SSH. Some of the popular ones include:

  • Telnet: Telnet is an older protocol that provides similar functionality to SSH, but without encryption. It is not recommended to use Telnet for remote administration due to security concerns.
  • Rlogin: Rlogin is another older protocol that provides remote login functionality, but it also lacks encryption.
  • SCP: SCP (Secure Copy) is a command-line tool that uses SSH for secure file transfer between hosts. It is similar to the file transfer functionality of SSH.
  • SFTP: SFTP (SSH File Transfer Protocol) is a protocol that provides secure file transfer capabilities over SSH. It is more advanced than SCP and supports features like directory listing and remote file management.

The benefits of using SSH over other protocols include:

  • Security: SSH provides encryption and authentication, making it secure for remote administration and file transfer.
  • Flexibility: SSH can be used for various purposes like remote command execution, file transfer, and tunneling.
  • Authentication: SSH supports various authentication methods, including password-based authentication and public key authentication.
  • Portability: SSH is available on most operating systems and can be used to connect to remote servers running different operating systems.

SSH Automation Scripts

Here are three examples of automation scripts that use the SSH command in Linux:

1. Script to execute a command on multiple remote servers

This script uses a loop to execute a command on multiple remote servers using SSH.


servers=("server1" "server2" "server3")

for server in "${servers[@]}"
ssh username@$server "command_to_execute"

2. Script to copy files to multiple remote servers

This script copies files to multiple remote servers using SCP.


servers=("server1" "server2" "server3")

for server in "${servers[@]}"
scp local_file username@$server:destination_directory

3. Script to execute a remote command and capture the output

This script executes a remote command using SSH and captures the output in a file.



ssh username@$server "command_to_execute" > output.txt

List of SSH Commands and Constants

Command/Constant Description
ssh Connect to a remote server using SSH
scp Securely copy files between hosts using SSH
ssh-keygen Generate SSH key pair
ssh-agent Manage SSH keys and provide authentication
ssh-add Add SSH private key to the SSH agent
~/.ssh/config SSH client configuration file
~/.ssh/authorized_keys File containing public keys for authentication


SSH commands are widely used by system administrators, developers, and network engineers for remote administration, file transfer, and tunneling. SSH provides a secure and flexible way to connect to remote servers and execute commands. It is a fundamental tool in the Linux world and is used daily by professionals working with Linux servers.

This article incorporates information and material from various online sources. We acknowledge and appreciate the work of all original authors, publishers, and websites. While every effort has been made to appropriately credit the source material, any unintentional oversight or omission does not constitute a copyright infringement. All trademarks, logos, and images mentioned are the property of their respective owners. If you believe that any content used in this article infringes upon your copyright, please contact us immediately for review and prompt action.

This article is intended for informational and educational purposes only and does not infringe on the rights of the copyright owners. If any copyrighted material has been used without proper credit or in violation of copyright laws, it is unintentional and we will rectify it promptly upon notification. Please note that the republishing, redistribution, or reproduction of part or all of the contents in any form is prohibited without express written permission from the author and website owner. For permissions or further inquiries, please contact us.

Leave a reply

Your email address will not be published. Required fields are marked