Visual Studio Code’s native SSH remote explorer connection is more than just an SSH tunnel — it needs to be able to execute some Linux binaries on the remote server in order for all of the fancy functionality to work.
When connecting to a FreeBSD server, VSCode may fail to connect and give you errors like:
 > Unsupported platform: FreeBSD > exitCode==35== > osReleaseId==freebsd==  Failed to parse remote port from server output  Terminating local server  > local-server-1> ssh child died, shutting down
Luckily, getting VSCode connecting to FreeBSD isn’t tough.
How to connect VSCode to a FreeBSD remote server
First, on the FreeBSD server, enable Linux compatibility mode, and then install the Linux base core.
sudo sysrc linux_enable="YES" sudo service linux start sudo pkg install linux_base-c7
Then, on the machine you’re using VSCode on, edit
.ssh/config and add these lines for the FreeBSD server’s entry.
Host xxx Hostname xxx RemoteCommand /compat/linux/usr/bin/bash RequestTTY force
Finally, find the
Enable Remote Command setting in VSCode and enable it.
Voila! Head on over to the remote explorer and connect to the server. You’ll now be able to interact with the FreeBSD remote just like it was a Linux host, with all the helpful functionality in VSCode that you’re used to.