root@localhost:~# finger | fsck
fsck from util-linux 2.39.2
e2fsck 1.47.0 (5-Feb-2024)
[+] Initializing User Information Daemon (fingerd)... OK
[+] Mounting target block device /dev/user... OK
Pass 1: Checking inodes, blocks, and physical posture...
Pass 2: Checking directory structure & user protocol integrity...
Pass 3: Checking directory connectivity...
Pass 4: Checking reference counts...
Pass 5: Checking group summary information...
[!] WARNING: Cannot run 'fsck' on active 'finger' daemon.
[!] ERROR: File system contains unholy command syntax combinations.
/dev/user: dirty, 69/420420 files, 1337/80085 blocks.
Notice: Please unmount user before attempting deep system diagnostics. Get your mind out of /dev/null.