$ cat /etc/fstab
# <file system> <mount point> <type> <options> <dump> <pass>
UUID=a168d1ac-4e13-4643-976d-6e47ea1732b1 /boot ext2 defaults 0 1
/dev/mapper/sda4_crypt / btrfs defaults,autodefrag,compress=lzo,inode_cache,space_cache,subvol=@ 0 2
/dev/mapper/sda4_crypt /tmp btrfs defaults,autodefrag,compress=lzo,inode_cache,space_cache,subvol=@tmp 0 2
/dev/mapper/sda4_crypt /run btrfs defaults,autodefrag,compress=lzo,inode_cache,space_cache,subvol=@run 0 2
/dev/mapper/sda4_crypt /var/crash btrfs defaults,autodefrag,compress=lzo,inode_cache,space_cache,subvol=@var-crash 0 2
/dev/mapper/sda4_crypt /var/tmp btrfs defaults,autodefrag,compress=lzo,inode_cache,space_cache,subvol=@var-tmp 0 2
/dev/mapper/sda4_crypt /var/log btrfs defaults,autodefrag,compress=lzo,inode_cache,space_cache,subvol=@var-log 0 2
/dev/mapper/sda4_crypt /var/spool btrfs defaults,autodefrag,compress=lzo,inode_cache,space_cache,subvol=@var-spool 0 2
/dev/mapper/sda5_crypt /home btrfs defaults,autodefrag,compress=lzo,inode_cache,space_cache,subvol=@home 0 3
/dev/mapper/750er /media/750er ext4 defaults 0 4
/dev/mapper/cswap none swap defaults 0 5
? ~ …我无法删除“apt-snapshot-release-upgrade-saucy-2013-10-19_00:52:26”btrfs 快照。以下是详细信息：
root@cioco:~# btrfs subvolume list -s /
ID 261 gen 246 cgen 245 top level 5 otime 2013-10-19 00:52:26 path @apt-snapshot-release-upgrade-saucy-2013-10-19_00:52:26
root@cioco:~# btrfs subvolume list /
ID 256 gen 334584 top level 5 path @
ID 258 gen 334134 top level 5 path @home
ID 261 gen 246 top level 5 path @apt-snapshot-release-upgrade-saucy-2013-10-19_00:52:26
ID 267 gen 334580 top level 256 path var/lib/lxc/mythtv/rootfs
ID 268 gen 334584 top level 256 path var/lib/lxc/jira/rootfs
ID 278 gen 279278 top level 256 path …