UUIDD(8) UUIDD(8) uuidd - UUID uuidd [] uuidd UUID (UUID), UUID, , , UUID. -C, --cont-clock[=number[hd]] Activate continuous clock handling for time-based UUIDs. uuidd could use all possible clock values, beginning with the daemon's start time. The optional argument can be used to set a value for 'max_clock_offset'. This guarantees that a clock value of a UUID will always be within the range of 'max_clock_offset'. The option -C or --cont-clock (without an argument) enables the feature with a default 'max_clock_offset' of 2 hours. The option -Cnumber or --cont-clock=number enables the feature with a 'max_clock_offset' of number seconds. In case of an appended h or d, number is understood in hours or days. The minimum value is 60 seconds, the maximum value is 365 days. -d, --debug uuidd . uuidd . -F, --no-fork . -k, --kill uuidd, . -n, --uuids uuidd, UUID. -P, --no-pid pid. -p, --pid , pid. , pid {runstatedir}/uuidd/uuidd.pid. -q, --quiet . -r, --random uuidd ' uuidd UUID. -S, --socket-activation , , , . --no-fork --no-pid. systemd(1). . -s, --socket uuidd unix. , {runstatedir}/uuidd/request. , , , libuuid. -T, --timeout uuidd . -t, --time uuidd ' uuidd UUID. -h, --help . -V, --version . , 42 , : uuidd -p /tmp/uuidd.pid -s /tmp/uuidd.socket uuidd -d -r -n 42 -s /tmp/uuidd.socket uuidd -d -k -s /tmp/uuidd.socket uuidd Theodore Ts'o . uuid(3), uuidgen(1) uuidd util-linux, Linux . util-linux 2.42.3 2026-09-02 UUIDD(8)