PAM_MAIL (man8)
pam_mail − Inform about available mail
pam_mail − Inform about available mail
catman − create or update the pre-formatted manual pages
btrfs-inspect-internal − query various internal information
cupsaccept/cupsreject − accept/reject jobs sent to a destination
fidentify − Determine file type using PhotoRec database
cache_repair – repair cache binary metadata from device/file to device/file.
isc-hmac-fixup − fixes HMAC keys generated by older versions of BIND
systemd-update-done.service, systemd-update-done − Mark /etc and /var fully updated
era_check – validate era metadata on device or file.
idmap_ad − Samba’s idmap_ad Backend for Winbind