SSH in Linux.
(1) What is SSH ?
SSH means "Secure Shell".
In simple words, used to connect from Device A => Device B.
program for logging into a remote machine and for executing commands on a remote machine.
runs on port 22.
(2) Why do we need SSH ?
intended to provide secure encrypted communications between two untrusted hosts over an insecure network.
In simple words, it means only authorized hosts can connect to the remote server.
(3) SSH Diagram
(4) How to SSH ?
Download "Git Bash" in your device [computer / laptop] which you want to connect to a remote server.
Access the below URL to download the Git bash in your device.
- Open git bash terminal and run the below command and press enter.
ssh-keygen
You will get this message:
Generating public/private ed25519 key pair.
Enter file in which to save the key (/c/Users/hp/.ssh/id_ed25519):
Just press enter, it will store the keys (public & private) inside your home folder.
Once you get the above image shown in above snap, run the following commands:
(a) pwd : see your current location
(b) cd <path_to_your_keys> : to navigate to your keys folder
(c) ls : to list all the items in current location
(d) cat <enter_your_public_key_name> : to see what is there inside the key
(e) ssh-copy-id username@<enter_your_remote_server_ip>: to copy public key from local to remote server.
Once the above steps are completed, congrats, you have successfully copied your public keys to your server, which you want to connect to.
Now, open a terminal (command prompt / git bash / wezterm) in your device and run the below command.
ssh username@<enter_your_remote_server_ip>
Note:
(a) username: enter your username which you have created while VM creation.
- After running the above command (eg: ssh user@192.168.1.101), you will be able to login to your server.
For Command prompt users, looks like:
For Git bash users, looks like:
For WezTerm users, looks like:
Congratulations !! You have logged in to your remote server. 😃
