SUBUID (man5)
subuid − the subordinate uid file
subuid − the subordinate uid file
xorg.conf, xorg.conf.d − configuration files for Xorg X server
user@.service, user-runtime-dir@.service, systemd-user-runtime-dir − System units to start the user manager
projid − the project name mapping file
logging − Shorewall logging
sane−tamarack − SANE backend for Tamarack flatbed scanners
shells − pathnames of valid login shells
routes − Shorewall file
namespace.conf − the namespace configuration file
sane−teco3 − SANE backend for TECO / RELISYS scanners