...ariable files, like files holding process identifiers (PIDs) and logged user information (utmp) . Files in this directory are usually cleared when the system boots. /var/spool S…...ed character sequences For historic reasons, some standard APIs and file formats, such as utmpx (5) and tar (1), use null-padded character sequences in fixed-size buffers. To in…...temd.exec (5) UpheldBy= systemd.unit (5) Upholds= systemd.unit (5) User= systemd.exec (5) UtmpIdentifier= systemd.exec (5) UtmpMode= systemd.exec (5) WakeSystem= systemd.timer (…