Generate new SSH Key
$ ssh-keygen -t rsa -b 4096 -C "name@email.com" ~/.ssh/id_rsa ~/.ssh/id-rsa.pub # (optional passphrase and name)Add new key to ssh-agent
$ eval $(ssh-agent -s)($ eval `ssh-agent -s`) Agent pid 12345$ ssh-add ~/.ssh/id_rsaFor Windows, open PowerShell as Administrator
Add-WindowsCapability -Online -Name OpenSSH.Client*OR
- Open Manage Optional Features
- Add a Feature
- Search for OpenSSH and install
THEN
$ key-gen -t rsa... read more
SSH Quick Guide
Generate new SSH Key
$ ssh-keygen -t rsa -b 4096 -C "name@email.com"
~/.ssh/id_rsa
~/.ssh/id-rsa.pub
# (optional passphrase and name)
Add new key to ssh-agent
$ eval $(ssh-agent -s)
($ eval `ssh-agent -s`)
Agent pid 12345
$ ssh-add ~/.ssh/id_rsa
For Windows, open PowerShell as Administrator
Add-WindowsCapability -Online -Name OpenSSH.Client*
OR
- Open Manage Optional Features
- Add a Feature
- Search for OpenSSH and install
THEN
$ key-gen -t rsa -b 4096 -C "name@email.com"
# C:\Users\user/.ssh/id_rsa
# C:\Users\user/.ssh/id_rsa.pub
$ New-Item -Path 'C:/Users/user/.ssh/config' -ItemType File
Copy SSH key to remote
Use ssh-copy-id (Mac Only)
brew install ssh-copy-id
ssh-copy-id demo@192.168.1.1
Alternatively
# (remote machine)
$ sudo nano ~/.ssh/authorized_keys
# (paste pub key here)
# (local machine)
$ cat -/.ssh/id_rsa.pub | ssh demo@192.168.1.1 "mkdir -p -/.ssh && chmod 700 -/.ssh $$ cat >> ~/.ssh/authorized_keys"
Configure local SSH profile
Add to ~/.ssh/config
Host GitHub
Hostname github.com
User git
IdentityFile ~/.ssh/id_rsa
Host Raspberry
Hostname 192.168.1.1
User pi
IdentityFile ~/.ssh/id_rsa
Disable Password Login
nano /etc/ssh/sshd_config
Change the following settings:
- “ChallengeResponseAuthentication no”
- “PasswordAuthentication no”
- “UsePAM no”
- “PermitRootLogin no”
SCP file transfer
# from local to remote
$ scp ~/file.txt user@remote:~/file.txt
# from remote to local
$ scp user@remote:/file.txt ~/file.txt
SSH Tunneling / Port Forwarding
$ ssh username@remote-server -L 5901:localhost:5900
$ ssh username@remote-server -R 5900:remote-server:5901
Common Commands
# (Directories)
$ ls -lah
$ cd /etc/
$ cd ~/Documents
$ mkdir
$ rmdir
$ rm -r
$ pwd
$ cp
$ mv
# (Network)
$ nano /etc/dhcpcd.conf
$ nano /etc/netplan/
$ nmtui
$ nmcli connection show
[up/down] wlan0
networking [on/off]
status
radio wifi [on/off]
$ ifconfig
$ ip a
$ curl ifconfig.io
# Services
$ service ssh [status/start/stop/restart]
$ systemctl [status/start/stop/restart] sshd
$ /etc/init.d/ssh reload
# Alias
$nano ~/.bashrc
alias la = "ls -a"
$ df -h
$ fdisk
# Users
$ adduser user
$ usermod -aG sudo user
$ deluser user
$ who
$ sudo su
$ passwd user
