systemd-id128
Generate and print 128-bit identifiers
TLDR
Generate a new random identifier
$ systemd-id128 new
Print the identifier of the current machine$ systemd-id128 machine-id
Print the identifier of the current boot$ systemd-id128 boot-id
Print the identifier of the current service invocation$ systemd-id128 invocation-id
Generate a new identifier and print it as a UUID$ systemd-id128 new -u
SYNOPSIS
systemd-id128 [options] [command]
DESCRIPTION
systemd-id128 generates and prints sd-128 identifiers used by systemd. These 128-bit identifiers uniquely identify machines, boots, and service invocations.
The machine ID is persistent across reboots and stored in /etc/machine-id. The boot ID changes each boot and identifies the current system session. The invocation ID is unique per service start.
PARAMETERS
new
Generate a new random identifiermachine-id
Print the machine ID from /etc/machine-idboot-id
Print the current boot IDinvocation-id
Print the service invocation ID (systemd services only)-u, --uuid
Print as UUID format (hyphen-separated groups)-p, --pretty
Print in human-readable format-a, --app-specific _app-id_
Generate application-specific ID
CAVEATS
The invocation-id subcommand only works within systemd service contexts. Machine IDs should not be changed after initial setup. UUIDs are compatible with RFC 4122. Part of the systemd suite.
SEE ALSO
systemd-machine-id-setup(1), machine-id(5), systemd(1)
