SSH Cheat Sheet
How to Audit SSH The /etc/ssh/sshd_config file has many options. Fortunately in a typical environment you have to only focus on a few options to
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How to restore an SSH backup on a Virtualmin server
To restore a backup on a Virtualmin server using SSH, you will need this information beforehand: SSH server File on server Login user Password Go
How to access Webmin behind a firewall using an SSH tunnel
At times your Webmin server might be behind a firewall and not accessible via port 10000. If you have SSH access to the server in
How to impersonate another Linux user using SUDO
sudo -i -u mary You need to use the -i (login) option. Reference https://www.howtogeek.com/447906/how-to-control-sudo-access-on-linux
How to use an SSH tunnel and a SOCKS proxy to browse via another Linux box
Background Certain mail black delisting services such as Project Honeypot requires you to access their delisting page from the IP address of the machine that
How to covert a .ppk SSH key file to .pem SSH key file
Background A client might provide you with a .ppk file, which is typically used with Putty and SSH connections. If, however, you are using Ubuntu
How to change the SSH port on a WHM Server
Background It’s essential to change the default port on any Linux server to avoid dictionary and brute force attacks. The steps to change the port
How to enable SSH for GCE
If you’re hosting a Linux box with Google Cloud Engine, SSH will be disabled by default. There are pretty good reasons for this, especially brute
ssh_dispatch_run_fatal: Connection to x.x.x.x port 22: DH GEX group out of range
You’re trying to SSH to a Zyxel switch and get the following message: user@hostname ~ $ ssh [email protected] -p 22 ssh_dispatch_run_fatal: Connection to x.x.x.x port
How to avoid having to retype a password repeatedly using ssh-keygen and ssh-copy-id
You are tired of using SSH and having to repeatedly type passwords. This slowing down your workflow, especially as you are working on multiple servers.