jin@kyo:~$ cd /var/run/timeshift/backup
jin@kyo:/var/run/timeshift/backup$ sudo btrfs sub del 昇級前退避home
ERROR: Could not statfs: No such file or directory
jin@kyo:/var/run/timeshift/backup$ ls
@ @home timeshift-btrfs 昇級前退避 昇級前退避home　
jin@kyo:/var/run/timeshift/backup$