LinuxJails

A linux distro in a jail is very useful for running isolated applications that are not currently in the FreeBSD ports collection.

AppJail will load the following kernel modules before using this option:

• fdescfs
• linprocfs
• tmpfs
• linsysfs
• pty
• linux: amd64 and i386 only.
• linux64: amd64 and aarch64 only.

appjail fetch debootstrap bookworm
appjail quick debian \
    osversion=bookworm \
    type=linux+debootstrap \
    start \
    linuxfs \
    devfs_ruleset=0 \
    template=/tmp/linux.conf \
    login

appjail-fetch(1) will download Debian Bullseye. We need to set the release version with osversion, use the linuxfs option to mount the filesystems used by the linux distribution, use the ruleset 0 and use a linux-specific template.

The ruleset can be different, you just need to allow /dev/shm and /dev/fd.

The linux template is as follows:

exec.start: "/bin/true"
exec.stop: "/bin/true"
persist

Warning

You need to install sysutils/debootstrap before using this method.