Jail

# kldload linux64 # enabled in /etc/rc.conf
pkg install -y debootstrap

export JAIL=debian
export JAILHOSTNAME=debian
export JAILDOMAIN=ahlawat.com
export JAILIP=65

iocage create -n "$JAIL" -e exec_start="/bin/true" exec_stop="/bin/true" exec_prestart="ifconfig tap65 create; ifconfig bridge1 addm tap65 up; ifconfig tap65 up; ifconfig tap65 inet6 auto_linklocal" interfaces="tap65:bridge1" ip4_addr="tap65|192.168.0.$JAILIP/24" defaultrouter="192.168.0.5" ip6_addr="tap65|2603:3024:3f6:e1::$JAILIP/64" defaultrouter6="2603:3024:3f6:e1::5" resolver="nameserver 192.168.0.5;nameserver 2603:3024:3f6:e1::5;search $JAILDOMAIN" allow_raw_sockets=1 boot=on host_hostname="$JAILHOSTNAME.$JAILDOMAIN"

debootstrap --arch=amd64 --no-check-gpg focal /mnt/iocage/jails/$JAIL/root/
echo "APT::Cache-Start 251658240;" > /mnt/iocage/jails/$JAIL/root/etc/apt/apt.conf.d/00aptitude

iocage fstab -e $JAIL

devfs           /mnt/iocage/jails/debian/root/dev      devfs           rw                      0       0
tmpfs           /mnt/iocage/jails/debian/root/dev/shm  tmpfs           rw,size=1g,mode=1777    0       0
fdescfs         /mnt/iocage/jails/debian/root/dev/fd   fdescfs         rw,linrdlnk             0       0
linprocfs       /mnt/iocage/jails/debian/root/proc     linprocfs       rw                      0       0
linsysfs        /mnt/iocage/jails/debian/root/sys      linsysfs        rw                      0       0
/tmp            /mnt/iocage/jails/debian/root/tmp      nullfs          rw                      0       0
/home           /mnt/iocage/jails/debian/root/home     nullfs          rw                      0       0

iocage fstab -l $JAIL

iocage start $JAIL

iocage console $JAIL

apt update
dpkg-reconfigure tzdata
apt install language-pack-en nano openssh-server
service ssh start
passwd # for su access
adduser ahlawat
exit

iocage set exec_start="service ssh start" debian