FreeBSD copy system to iocage jail

Create a New Jail and cpdup (Recommended)

This method creates a fresh, empty jail and copies your current system files into it, excluding virtual filesystems and host-specific configuration. Create a blank, thick jail:

Replace <release> with your version (e.g., 14.0-RELEASE)

iocage create -r <release> -n new_jail_name

Ensure the new jail dataset is mounted:

Find the jail dataset

iocage list [-l]

Usually: zroot/iocage/jails/<UUID>/root

Use cpdup to copy the system (avoids special files): Install cpdup if you don't have it (pkg install cpdup).

cpdup / /iocage/jails/new_jail_name/root/

Clean up the Jail:

You must remove host-specific configuration from the jail so it boots correctly.

Edit fstab to prevent mounting host disks

vi /iocage/jails/new_jail_name/fstab

Remove /dev/proc, etc.

Start the jail:

iocage start new_jail_name