SSH reminder¶

1. Remove a key from known hosts:¶

ssh-keygen -f "/home/user/.ssh/known_hosts" -R "key_name"

2. Create a key:¶

ssh-keygen -o -a 100 -t ed25519 -C user@email #create an ED25519 key
ssh-keygen -b 4096 -t rsa -C user@email #create a RSA key
ssh-add newkey #add newkey to your SSH agent
ssh-add *
ssh-add .

3. List existing keys:¶

ssh-add -l

4. Display a key:¶

cat /home/user/.ssh/key_name

5. Display a key fingerprint (with random art image):¶

ssh-keygen -lvf key_name

6. Enable SSH agent:¶

eval $(ssh-agent -s)

7. Copy a key to a distant server:¶

ssh-copy-id user@server #Copy all keys that are registered in SSH agent
ssh-copy-id -i newkey.pub user@server\n #Copy newkey.pub

8. Remove a key:¶

Removing a key from a server can be done by editing your /home/user/.ssh/authorized_keys file.

9. Connect and copy from a different port number:¶

ssh -p port user@server
scp -P port file user@server:way/
rsync -e ssh -avz /source server:/target
rsync -ave ssh server:/source /target
ssh-copy-id -i newkey.pub -p port user@server

10. Connect a distant server in your file browser under Linux using SFTP:¶

Type the adress:

ssh://user@server:port