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 --uuid
Generate an application-specific ID derived from the machine ID$ systemd-id128 machine-id --app-specific [app-id]
Show well-known identifiers$ systemd-id128 show
SYNOPSIS
systemd-id128 [options] command
DESCRIPTION
systemd-id128 generates and prints sd-id128 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 identifier.machine-id
Print the machine ID from /etc/machine-id.boot-id
Print the current boot ID.invocation-id
Print the service invocation ID (systemd services only).show [NAME|UUID...]
Display well-known systemd identifiers.-u, --uuid
Print in UUID format with hyphen-separated groups.-p, --pretty
Generate output as programming language snippets.-P, --value
Only print the identifier value.-a, --app-specific APP-ID
Generate an application-specific ID by hashing the machine or boot ID with the given application ID.--json=MODE
Output in JSON format. MODE is short, pretty, or off.--no-pager
Disable pager output.--no-legend
Omit column headers and footer with show command.
INSTALL
sudo apt install systemd
sudo dnf install systemd
sudo pacman -S systemd
sudo zypper install systemd
brew install systemd
nix profile install nixpkgs#systemd
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), systemctl(1), uuidgen(1)