Basic Linux Commands

May 1st 2023 — basic, command, linux, terminal

SSH Settings

This part is to manipulate ssh settings, see its status etc. Useful if just started a container in Proxmox

First, if SSH is not installed:

sudo apt-get update
sudo apt-get install openssh-server

Then manipulate 'sshd_config' file. If not added add lines below to prevent remote root login, allow remote password logging and set ssh port number(22 by default)

sudo nano /etc/ssh/sshd_config

Port 22
PermitRootLogin no
PasswordAuthentication yes

To see status of SSH, restart or stop it etc use codes below:

sudo systemctl status ssh
sudo systemctl start ssh
sudo systemctl restart ssh
sudo systemctl stop ssh

If ufw is running you may need to make it allow SSH

sudo ufw status
sudo ufw allow ssh

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Alternate for not using 'root'

sudo nano /etc/ssh/sshd_config

then add this

PermitRootLogin no
PasswordAuthentication yes

and restart sshd service

sudo systemctl restart sshd

since you are not using root user, creata a user with sudo privileges 

sudo adduser <username>
sudo usermod -aG sudo <username>