Use the native IPsec stack to connect multiple networks over the internet.
Perform hostname canonicalization to simplify your configuration and ease work with multiple servers.
Match specific network inside the SSH client configuration file using Python helper script.
Define multiple configurations for the same host using the SSH client configuration file.
Use Python script to determine if the hostname belongs to a specific network.
Keep track of network latency using SmokePing on Debian Buster.
SmokePing 2.7.3 needs an update to use the SSH probe on Debian Buster.
Determine available authentication methods on the specified OpenSSH server.
Unmount not accessible NFS share that still has open files.
I have already described how to create VLAN interface, but things have changed over time, so I decided to update the know-how.