I have my default ZFS installation from a clean install of Ubuntu 19.10 and I want a full snapshot of the entire system.
NAME USED AVAIL REFER MOUNTPOINT
bpool 130M 1.62G 176K /boot
bpool/BOOT 129M 1.62G 176K none
bpool/BOOT/ubuntu_7j8cap 129M 1.62G 129M /boot
rpool 534G 380G 96K /
rpool/ROOT 81.3G 380G 96K none
rpool/ROOT/ubuntu_7j8cap 81.3G 380G 6.16G /
rpool/ROOT/ubuntu_7j8cap/srv 96K 380G 96K /srv
rpool/ROOT/ubuntu_7j8cap/usr 260K 380G 96K /usr
rpool/ROOT/ubuntu_7j8cap/usr/local 164K 380G 164K /usr/local
rpool/ROOT/ubuntu_7j8cap/var 75.2G 380G 96K /var
rpool/ROOT/ubuntu_7j8cap/var/games 96K 380G 96K /var/games
rpool/ROOT/ubuntu_7j8cap/var/lib 74.7G 380G 74.6G /var/lib
rpool/ROOT/ubuntu_7j8cap/var/lib/AccountServices 96K 380G 96K /var/lib/AccountServices
rpool/ROOT/ubuntu_7j8cap/var/lib/NetworkManager 180K 380G 180K /var/lib/NetworkManager
rpool/ROOT/ubuntu_7j8cap/var/lib/apt 73.2M 380G 73.2M /var/lib/apt
rpool/ROOT/ubuntu_7j8cap/var/lib/dpkg 47.3M 380G 47.3M /var/lib/dpkg
rpool/ROOT/ubuntu_7j8cap/var/log 214M 380G 214M /var/log
rpool/ROOT/ubuntu_7j8cap/var/mail 96K 380G 96K /var/mail
rpool/ROOT/ubuntu_7j8cap/var/snap 219M 380G 219M /var/snap
rpool/ROOT/ubuntu_7j8cap/var/spool 132K 380G 132K /var/spool
rpool/ROOT/ubuntu_7j8cap/var/www 96K 380G 96K /var/www
rpool/USERDATA 453G 380G 96K /
rpool/USERDATA/neal_70puag 453G 380G 212G /home/neal
rpool/USERDATA/root_70puag 380K 380G 380K /root
I make my snapshot zfs snap rpool@today
and mount it mount -t zfs rpool@today /media/zfs
and ls my new mount /media/zfs
but it's empty.
I can snapshot and mount rpool/USERDATA/neal_70puag filled with only my home directory files, but how do I get a full snapshot of the entire system all at once? I'm not seeing this in any documentation.