systemctl-daemon-reexec
Re-execute systemd manager binary
TLDR
Reexecute systemd manager
SYNOPSIS
systemctl daemon-reexec
DESCRIPTION
systemctl daemon-reexec reexecutes the systemd manager (PID 1), replacing the running systemd binary with a new copy while preserving the current state of all units. This is used after upgrading the systemd package to apply the new binary without rebooting.
Unlike `daemon-reload`, which only reloads configuration, `daemon-reexec` replaces the entire systemd process. All running services continue undisturbed during the transition.
CAVEATS
Requires root privileges. Should only be used after systemd package upgrades. Service states are preserved but any in-flight transactions may be affected. Not typically needed during normal operation.
HISTORY
The daemon-reexec subcommand enables live upgrades of systemd itself without requiring a system reboot, supporting modern zero-downtime maintenance practices.
SEE ALSO
systemctl-daemon-reload(1), systemctl(1)