I recently had the need to update my shiny new FreeBSD jailed server because I wanted to migrate to WordPress. I didn’t want to bring down the existing server while I did the install and converted my content so I managed to clone my existing jailed server using warden:
warden export name_of_jail --dir=/directory_for_warden_file
This will take a while… Once done, you can import the warden file creating a new jail:
warden import jail_warden_file.wdn --host=jailbird --ipv4=192.168.1.105/24
You’ve now got a cloned jail and a template for creating other jailed servers.