SSH

Generate local key to access remote host

On client:

   1 ssh-keygen -t dsa # with empty password
   2 cd ~/.ssh
   3 cat id_dsa.pub # public key
   4

On SSHserver:

   1 mkdir -p ~/.ssh
   2 cd /home/userx/.ssh
   3 vi authorized_keys # paste the id_dsa.pub (public key) content generated on the client
   4 chmod 0600 authorized_keys

Login from the client with ssh userx@remote.example.org should ask for not password. Useful to invoke commands remotely using ssh

Copy file to SSH server listening on different port

   1 scp -P 2222 filex userx@sshserver.example.org:/home/userx

Add listening ports on Ubuntu

Edit file /etc/ssh/sshd_config to set port 22 and 1234

   1 Port 22
   2 Port 1234

Restart service with service ssh restart

   1 nano /etc/ssh/sshd_config
   2 sshd -t 
   3 service ssh restart
   4 ss -at -n | grep -i listen

   1 sudo systemctl edit ssh.socket

[Socket]
ListenStream=
ListenStream=22
ListenStream=2222

   1 systemctl daemon-reload
   2 systemctl restart ssh.socket
   3 ss -at -n | grep -i listen

SSHFS

Ability to mount a user filesystem with FUSE on a remote SSH folder

   1 sudo apt install sshfs
   2 cd ~
   3 mkdir remotesshfsfolder
   4 sshfs user@host.example.org:/home/user remotesshfsfolder/ -p 1234

-  ⇤ ← Revision 8 as of 2025-02-15 18:03:20 → 
  Size: 1083
  Editor: vitor
  Comment:
+   ← Revision 11 as of 2026-05-03 15:27:09 → ⇥
  Size: 1445
  Editor: vitor
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 36:
+{{{#!highlight sh
nano /etc/ssh/sshd_config
sshd -t 
service ssh restart
ss -at -n | grep -i listen
}}}

{{{#!highlight sh
sudo systemctl edit ssh.socket
}}}

{{{
[Socket]
ListenStream=
ListenStream=22
ListenStream=2222
}}}

{{{#!highlight sh
systemctl daemon-reload
systemctl restart ssh.socket
ss -at -n | grep -i listen
}}}
-Line 42:
+Line 67:
-sshfs user@host.example.org:/home/user remotesshfsfolder/
+sshfs user@host.example.org:/home/user remotesshfsfolder/ -p 1234