Package systemd

System and Service Manager

https://www.freedesktop.org/wiki/Software/systemd

systemd is a system and service manager that runs as PID 1 and starts
the rest of the system. It provides aggressive parallelization
capabilities, uses socket and D-Bus activation for starting services,
offers on-demand starting of daemons, keeps track of processes using
Linux control groups, maintains mount and automount points, and
implements an elaborate transactional dependency-based service control
logic. systemd supports SysV and LSB init scripts and works as a
replacement for sysvinit. Other parts of this package are a logging daemon,
utilities to control basic system configuration like the hostname,
date, locale, maintain a list of logged-in users, system accounts,
runtime directories and settings, and daemons to manage simple network
configuration, network time synchronization, log forwarding, and name
resolution.

General Commands
Command	Description
busctl	Introspect the bus
coredumpctl	Retrieve and process saved core dumps and metadata
hostnamectl	Control the system hostname
init	alias for systemd
journalctl	Query the systemd journal
localectl	Control the system locale and keyboard layout settings
loginctl	Control the systemd login manager
networkctl	Query the status of network links
portablectl	Attach, detach or inspect portable service images
resolvconf	alias for resolvectl
resolvectl	Resolve domain names, IPV4 and IPv6 addresses, DNS resource records, and...
systemctl	Control the systemd system and service manager
systemd	systemd system and service manager
systemd-analyze	Analyze and debug system manager
systemd-ask-password	Query the user for a system password
systemd-cat	Connect a pipeline or program's output with the journal
systemd-cgls	Recursively show control group contents
systemd-cgtop	Show top control groups by their resource usage
systemd-delta	Find overridden configuration files
systemd-detect-virt	Detect execution in a virtualized environment
systemd-escape	Escape strings for usage in systemd unit names
systemd-firstboot	Initialize basic system settings on or before the first boot-up of a system
systemd-firstboot.service	alias for systemd-firstboot
systemd-id128	Generate and print sd-128 identifiers
systemd-inhibit	Execute a program with an inhibition lock taken
systemd-machine-id-setup	Initialize the machine ID in /etc/machine-id
systemd-mount	Establish and destroy transient mount or auto-mount points
systemd-notify	Notify service manager about start-up completion and other daemon status changes
systemd-path	List and query system and user paths
systemd-run	Run programs in transient scope units, service units, or path-, socket-, or...
systemd-socket-activate	Test socket activation of daemons
systemd-tty-ask-password-agent	List or process pending systemd password requests
systemd-umount	alias for systemd-mount
timedatectl	Control the system time and date

File Formats
File	Description
binfmt.d	Configure additional binary formats for executables at boot
coredump.conf	Core dump storage configuration files
coredump.conf.d	alias for coredump.conf
crypttab	Configuration for encrypted block devices
dnssec-trust-anchors.d	DNSSEC trust anchor configuration files
environment.d	Definition of user session environment
hostname	Local hostname configuration file
journald.conf	Journal service configuration files
journald.conf.d	alias for journald.conf
loader.conf	Configuration file for systemd-boot
locale.conf	Configuration file for locale settings
localtime	Local timezone configuration file
logind.conf	Login manager configuration files
logind.conf.d	alias for logind.conf
machine-id	Local machine ID configuration file
machine-info	Local machine information file
networkd.conf	Global Network configuration files
networkd.conf.d	alias for networkd.conf
os-release	Operating system identification
pstore.conf	PStore configuration file
pstore.conf.d	alias for pstore.conf
resolved.conf	Network Name Resolution configuration files
resolved.conf.d	alias for resolved.conf
sysctl.d	Configure kernel parameters at boot
system.conf.d	alias for systemd-system.conf
systemd-system.conf	System and session service manager configuration files
systemd-user.conf	alias for systemd-system.conf
systemd.automount	Automount unit configuration
systemd.device	Device unit configuration
systemd.dnssd	DNS-SD configuration
systemd.exec	Execution environment configuration
systemd.kill	Process killing procedure configuration
systemd.link	Network device configuration
systemd.mount	Mount unit configuration
systemd.negative	alias for dnssec-trust-anchors.d
systemd.netdev	Virtual Network Device configuration
systemd.network	Network configuration
systemd.nspawn	Container settings
systemd.path	Path unit configuration
systemd.positive	alias for dnssec-trust-anchors.d
systemd.preset	Service enablement presets
systemd.resource-control	Resource control unit settings
systemd.scope	Scope unit configuration
systemd.service	Service unit configuration
systemd.slice	Slice unit configuration
systemd.socket	Socket unit configuration
systemd.swap	Swap unit configuration
systemd.target	Target unit configuration
systemd.timer	Timer unit configuration
systemd.unit	Unit configuration
sysusers.d	Declarative allocation of system users and groups
tmpfiles.d	Configuration for creation, deletion and cleaning of volatile and temporary...
user-runtime-dir@.service	alias for user@.service
user.conf.d	alias for systemd-system.conf
user@.service	System units to manage user processes

Miscellanea
Name	Description
bootup	System bootup process
daemon	Writing and packaging system daemons
file-hierarchy	File system hierarchy overview
kernel-command-line	Kernel command line parameters
sd-boot	alias for systemd-boot
systemd-boot	A simple UEFI boot manager
systemd.directives	Index of configuration directives
systemd.environment-generator	systemd environment file generators
systemd.generator	systemd unit generators
systemd.index	List all manpages from the systemd project
systemd.journal-fields	Special journal fields
systemd.net-naming-scheme	Network device naming schemes
systemd.offline-updates	Implementation of offline updates in systemd
systemd.special	Special systemd units
systemd.syntax	General syntax of systemd configuration files
systemd.time	Time and date specifications

System Administration
Command	Description
30-systemd-environment-d-generator	alias for systemd-environment-d-generator
halt	Halt, power-off or reboot the machine
nss-myhostname	Provide hostname resolution for the locally configured system hostname.
nss-resolve	Provide hostname resolution via systemd-resolved.service
nss-systemd	Provide UNIX user and group name resolution for dynamic users and groups.
pam_systemd	Register user sessions in the systemd login manager
poweroff	alias for halt
reboot	alias for halt
runlevel	Print previous and current SysV runlevel
shutdown	Halt, power-off or reboot the machine
systemd-ask-password-console.path	alias for systemd-ask-password-console.service
systemd-ask-password-console.service	Query the user for system passwords on the console and via wall
systemd-ask-password-wall.path	alias for systemd-ask-password-console.service
systemd-ask-password-wall.service	alias for systemd-ask-password-console.service
systemd-binfmt	alias for systemd-binfmt.service
systemd-binfmt.service	Configure additional binary formats for executables at boot
systemd-bless-boot-generator	Pull systemd-bless-boot.service into the initial boot transaction when boot...
systemd-bless-boot.service	Mark current boot process as successful
systemd-boot-check-no-failures.service	verify that the system booted up cleanly
systemd-boot-system-token.service	Generate an initial boot loader system token and random seed
systemd-coredump	Acquire, save and process core dumps
systemd-coredump.socket	alias for systemd-coredump
systemd-coredump@.service	alias for systemd-coredump
systemd-debug-generator	Generator for enabling a runtime debug shell and masking specific units at boot
systemd-environment-d-generator	Load variables specified by environment.d
systemd-fsck	alias for systemd-fsck@.service
systemd-fsck-root.service	alias for systemd-fsck@.service
systemd-fsck@.service	File system checker logic
systemd-fstab-generator	Unit generator for /etc/fstab
systemd-getty-generator	Generator for enabling getty instances on the console
systemd-halt.service	System shutdown logic
systemd-hostnamed	alias for systemd-hostnamed.service
systemd-hostnamed.service	Host name bus mechanism
systemd-initctl	alias for systemd-initctl.service
systemd-initctl.service	/dev/initctl compatibility
systemd-initctl.socket	alias for systemd-initctl.service
systemd-journald	alias for systemd-journald.service
systemd-journald-audit.socket	alias for systemd-journald.service
systemd-journald-dev-log.socket	alias for systemd-journald.service
systemd-journald.service	Journal service
systemd-journald.socket	alias for systemd-journald.service
systemd-kexec.service	alias for systemd-halt.service
systemd-localed	alias for systemd-localed.service
systemd-localed.service	Locale bus mechanism
systemd-logind	alias for systemd-logind.service
systemd-logind.service	Login manager
systemd-machine-id-commit.service	Commit a transient machine ID to disk
systemd-networkd	alias for systemd-networkd.service
systemd-networkd-wait-online	alias for systemd-networkd-wait-online.service
systemd-networkd-wait-online.service	Wait for network to come online
systemd-networkd.service	Network manager
systemd-portabled	alias for systemd-portabled.service
systemd-portabled.service	Portable service manager
systemd-poweroff.service	alias for systemd-halt.service
systemd-pstore	Tool to archive contents of the persistent storage filesytem
systemd-pstore.service	alias for systemd-pstore
systemd-rc-local-generator	Compatibility generator for starting /etc/rc.local during boot
systemd-reboot.service	alias for systemd-halt.service
systemd-resolved	alias for systemd-resolved.service
systemd-resolved.service	Network Name Resolution manager
systemd-run-generator	Generator for invoking commands specified on the kernel command line as system...
systemd-shutdown	alias for systemd-halt.service
systemd-socket-proxyd	Bidirectionally proxy local sockets to another (possibly remote) socket.
systemd-sysctl	alias for systemd-sysctl.service
systemd-sysctl.service	Configure kernel parameters at boot
systemd-system-update-generator	Generator for redirecting boot to offline update mode
systemd-sysusers	Allocate system users and groups
systemd-sysusers.service	alias for systemd-sysusers
systemd-sysv-generator	Unit generator for SysV init scripts
systemd-time-wait-sync	alias for systemd-time-wait-sync.service
systemd-time-wait-sync.service	Wait Until Kernel Time Synchronized
systemd-timedated	alias for systemd-timedated.service
systemd-timedated.service	Time and date bus mechanism
systemd-tmpfiles	Creates, deletes and cleans up volatile and temporary files and directories
systemd-tmpfiles-clean.service	alias for systemd-tmpfiles
systemd-tmpfiles-clean.timer	alias for systemd-tmpfiles
systemd-tmpfiles-setup.service	alias for systemd-tmpfiles
systemd-update-done	alias for systemd-update-done.service
systemd-update-done.service	Mark /etc and /var fully updated
systemd-update-utmp	alias for systemd-update-utmp.service
systemd-update-utmp-runlevel.service	alias for systemd-update-utmp.service
systemd-update-utmp.service	Write audit and utmp updates at bootup, runlevel changes and shutdown
systemd-user-sessions	alias for systemd-user-sessions.service
systemd-user-sessions.service	Permit user logins after boot, prohibit user logins at shutdown
systemd-veritysetup	alias for systemd-veritysetup@.service
systemd-veritysetup-generator	Unit generator for integrity protected block devices
systemd-veritysetup@.service	Disk integrity protection logic
systemd-volatile-root	alias for systemd-volatile-root.service
systemd-volatile-root.service	Make the root file system volatile
telinit	Change SysV runlevel