diff --git a/focker.py b/focker.py
index a32ccf9..c9c477c 100644
--- a/focker.py
+++ b/focker.py
@@ -15,7 +15,8 @@ from .volume import command_volume_create, \
     command_volume_untag
 import sys
 from .zfs import zfs_init
-from .jail import command_jail_run
+from .jail import command_jail_run, \
+    command_jail_list
 
 
 def create_parser():
@@ -59,6 +60,10 @@ def create_parser():
     parser.add_argument('--command', '-c', type=str, default='/bin/sh')
     parser.add_argument('--mounts', '-m', type=str, nargs='+', default=[])
 
+    parser = subparsers.add_parser('list')
+    parser.set_defaults(func=command_jail_list)
+    parser.add_argument('--full-sha256', '-f', action='store_true')
+
     # volume
     subparsers = subparsers_top.add_parser('volume').add_subparsers()
     parser = subparsers.add_parser('create')
diff --git a/jail.py b/jail.py
index f6b33ec..77a89d0 100644
--- a/jail.py
+++ b/jail.py
@@ -3,6 +3,7 @@ from .zfs import *
 import random
 import shutil
 import json
+from tabulate import tabulate
 
 
 def get_jid(path):
@@ -59,11 +60,12 @@ def command_jail_run(args):
     base, _ = zfs_snapshot_by_tag_or_sha256(args.image)
     # root = '/'.join(base.split('/')[:-1])
     for _ in range(10**6):
-        name = bytes([ random.randint(0, 255) for _ in range(4) ]).hex()[:7]
+        sha256 = bytes([ random.randint(0, 255) for _ in range(32) ]).hex()
+        name = sha256[:7]
         name = base.split('/')[0] + '/focker/jails/' + name
         if not zfs_exists(name):
             break
-    zfs_run(['zfs', 'clone', base, name])
+    zfs_run(['zfs', 'clone', '-o', 'focker:sha256=' + sha256, base, name])
     try:
         mounts = list(map(lambda a: a.split(':'), args.mounts))
         jail_run(zfs_mountpoint(name), args.command, mounts)
@@ -72,3 +74,14 @@ def command_jail_run(args):
         # subprocess.run(['umount', zfs_mountpoint(name) + '/dev'])
         zfs_run(['zfs', 'destroy', '-f', name])
         # raise
+
+def command_jail_list(args):
+    lst = zfs_list(fields=['focker:sha256,focker:tags,mountpoint'], focker_type='jail')
+    jails = subprocess.check_output(['jls', '--libxo=json'])
+    jails = json.loads(jails)['jail-information']['jail']
+    jails = { j['path']: j for j in jails }
+    lst = list(map(lambda a: [ a[1],
+        a[0] if args.full_sha256 else a[0][:7],
+        a[2],
+        jails[a[2]]['jid'] if a[2] in jails else '-' ], lst))
+    print(tabulate(lst, headers=['Tags', 'SHA256', 'mountpoint', 'JID']))
diff --git a/zfs.py b/zfs.py
index f60d3fa..a34401c 100644
--- a/zfs.py
+++ b/zfs.py
@@ -49,6 +49,15 @@ def zfs_find(reference, focker_type='image', zfs_type='filesystem'):
     return (lst[0][3], lst[0][0])
 
 
+def zfs_list(fields=['name'], focker_type='image', zfs_type='filesystem'):
+    poolname = zfs_poolname()
+    fields.append('focker:sha256')
+    lst = zfs_parse_output(['zfs', 'list', '-o', ','.join(fields),
+        '-H', '-t', zfs_type, '-r', poolname + '/focker/' + focker_type + 's'])
+    lst = list(filter(lambda a: a[-1] != '-', lst))
+    return lst
+
+
 def zfs_prune(focker_type='image'):
     poolname = zfs_poolname()
     again = True