SSH keys are a way to identify trusted computers, without involving passwords. The steps below will walk you through generating an SSH key and adding the public key to the server. Step 1: Check for SSH Keys First, check for existing SSH keys on your computer. Open Git Bash, Cygwin, or Terminal, etc.
This is quite a common task for Linux system administrators, when it is needed to execute some command or a local Bash script from a one Linux workstation or a server on another remote Linux machine over SSH.
In this article you will find the examples of how to execute a remote command, multiple commands or a Bash script over SSH between remote Linux hosts and get back the output (result).
This information will be especially useful for ones, who want to create a Bash script that will be hosted locally on a one Linux machine but would be executed remotely on the other hosts over SSH.
Cool Tip: Connect to a remote SSH server without typing a password! Configure a passwordless authentication! Only 3 easy steps! Read more →
- Ssh-keygen -t rsa -N ' -f my.key -N ' tells it to use an empty passphrase (the same as two of the enters in an interactive script)-f my.key tells it to store the key into my.key (change as you see fit). The whole thing runs without you needing to supply any enter keys:) To send enters to an interactive script: echo -e ' ' ssh-keygen.
- To generate an SSH key in Windows 10: Ensure the Windows 10 OpenSSH client is installed. Run “ssh-keygen” in Command Prompt and follow the instructions to generate your key.
- Generating a new SSH key. Open Terminal Terminal Git Bash. Paste the text below, substituting in your GitHub email address. $ ssh-keygen -t rsa -b 4096 -C '[email protected]' This creates a new ssh key, using the provided email as a label. Generating public/private rsa key pair.
- Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. Bash script to create user then create ssh keys. Please note I am a total linux newbie, please bare that in mind when answering this question as I have very limited knowledge of linux.
SSH: Execute Remote Command
Execute a remote command on a host over SSH: Grid 2 activation product key generator.
Examples
Get the uptime of the remote server:
Reboot the remote server:
SSH: Run Multiple Remote Commands
In the most cases it is not enough to send only one remote command over SSH.Bash Script Generate Ssh Key
Much more often it is required to send multiple commands on a remote server, for example, to collect some data for inventory and get back the result.
There are a lot of different ways of how it can be done, but i will show the most popular of them.
Bash Script To Generate Ssh Keys
Run multiple command on a remote host over SSH:
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Examples
Get the uptime and the disk usage:
Get the memory usage and the load average:
Show the kernel version, number of CPUs and the total RAM:
SSH: Run Bash Script on Remote Server
The equally common situation, when there is some Bash script on a Linux machine and it needs to connect from it over SSH to another Linux machine and run this script there.The idea is to connect to a remote Linux server over SSH, let the script do the required operations and return back to local, without need not to upload this script to a remote server.
Certainly this can be done and moreover quite easily.
Cool Tip: Want to ROCK? Start a GUI (graphical) application on a remote Linux workstation over SSH! Read more →
Generate Ssh Key Bash
Example
Execute the local script.sh on the remote server: