How to ssh to a remote server without typing your password

Save yourself a few keystrokes. Follow the steps below:

Run this Bash script on your laptop:

#!/usr/bin/env bash

# The hostname of your remote server.
host=myserver.com

# Create this folder if it does not exist: ~/.ssh
mkdir ~/.ssh

# Set the correct permissions (required)
chmod 700 ~/.ssh

# Generate an RSA key pair for identification with the remote server
ssh-keygen -t rsa

# Copy your public key to the remote server
cat ~/.ssh/id_rsa.pub | ssh $host 'cat >> ~/.ssh/authorized_keys'

# ssh is very strict about correct permissions
ssh $host 'chmod g-w,o-w ~; chmod 700 ~/.ssh; chmod 600 ~/.ssh/authorized_keys'

At this point, you can connect to your server without typing a password:

ssh [email protected]

If you would prefer to type jupiter (7 characters) rather than [email protected] (21 characters), create a config file ~/.ssh/config as shown below. You'll be able to use this alias with: rsync, scp, and ssh.
```
# ~/.ssh/config
Host jupiter
    User carl
    HostName myserver.com
```
At this point, you can connect to your server like this:
```
ssh jupiter
```
If you want a single command to do two steps:
1. First, connect to a login server jupiter
2. Next, connect to a work server saturn
Then configure your ~/.ssh/config file as follows:
```
# ~/.ssh/config

Host jupiter
    User carl
    Hostname myserver.com

Host saturn
    User carl
    ProxyCommand ssh -qX jupiter nc %h %p
```
At this point, you can connect to saturn via jupiter like this:
```
ssh saturn
```

AliAryanTech/ssh-tutorial.md

How to ssh to a remote server without typing your password

Further reading