System and Service Manager
http://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 and running
containers and virtual machines, system accounts, runtime directories
and settings, and daemons to manage simple network configuration,
network time synchronization, log forwarding, and name resolution.
| Command | Description |
|---|---|
| bootctl | Control the firmware and boot manager settings |
| busctl | Introspect the bus |
| coredumpctl | Retrieve and process saved core dumps and metadata |
| hostnamectl | Control the system hostname |
| journalctl | Query the systemd journal |
| localectl | Control the system locale and keyboard layout settings |
| loginctl | Control the systemd login manager |
| machinectl | Control the systemd machine manager |
| networkctl | Query the status of network links |
| systemctl | Control the systemd system and service manager |
| systemd | systemd system and service manager |
| systemd-analyze | Analyze system boot-up performance |
| 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 system unit names |
| systemd-firstboot | Initialize basic system settings on or before the first boot-up of a system |
| 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-resolve | Resolve domain names, IPV4 and IPv6 addresses, DNS resource records, and... |
| systemd-run | Run programs in transient scope units, service units, or timer-scheduled service... |
| systemd-socket-activate | Test socket activation of daemons |
| systemd-tty-ask-password-agent | List or process pending systemd password requests |
| timedatectl | Control the system time and date |
| File | Description |
|---|---|
| binfmt.d | Configure additional binary formats for executables at boot |
| coredump.conf | Core dump storage configuration files |
| 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 |
| journal-upload.conf | Configuration files for the journal upload service |
| locale.conf | Configuration file for locale settings |
| localtime | Local timezone configuration file |
| logind.conf | Login manager configuration files |
| machine-id | Local machine ID configuration file |
| machine-info | Local machine information file |
| networkd.conf | Global Network configuration files |
| os-release | Operating system identification |
| resolved.conf | Network Name Resolution configuration files |
| sysctl.d | Configure kernel parameters at boot |
| systemd.automount | Automount unit configuration |
| systemd.device | Device unit configuration |
| systemd.exec | Execution environment configuration |
| systemd.kill | Process killing procedure configuration |
| systemd.link | Network device configuration |
| systemd.mount | Mount unit configuration |
| systemd.netdev | Virtual Network Device configuration |
| systemd.network | Network configuration |
| systemd.nspawn | Container settings |
| systemd.path | Path unit configuration |
| 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-system.conf | System and session service manager configuration files |
| 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... |
| vconsole.conf | Configuration file for the virtual console |
| 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 |
| 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.offline-updates | Implementation of offline updates in systemd |
| systemd.special | Special systemd units |
| systemd.time | Time and date specifications |
| Command | Description |
|---|---|
| halt | Halt, power-off or reboot the machine |
| kernel-install | Add and remove kernel and initramfs images to and from /boot |
| nss-myhostname | Provide hostname resolution for the locally configured system hostname. |
| nss-mymachines | Provide hostname resolution for local container instances. |
| 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 |
| runlevel | Print previous and current SysV runlevel |
| shutdown | Halt, power-off or reboot the machine |
| systemd-ask-password-console.service | Query the user for system passwords on the console and via wall |
| systemd-binfmt.service | Configure additional binary formats for executables at boot |
| systemd-coredump | Acquire, save and process core dumps |
| 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@.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-gpt-auto-generator | Generator for automatically discovering and mounting root, /home and /srv... |
| systemd-halt.service | System shutdown logic |
| systemd-hostnamed.service | Host name bus mechanism |
| systemd-importd.service | VM and container image import and export service |
| systemd-initctl.service | /dev/initctl compatibility |
| systemd-journald.service | Journal service |
| systemd-localed.service | Locale bus mechanism |
| systemd-logind.service | Login manager |
| systemd-machine-id-commit.service | Commit a transient machine ID to disk |
| systemd-networkd.service | Network manager |
| systemd-networkd-wait-online.service | Wait for network to come online |
| systemd-remount-fs.service | Remount root and kernel file systems |
| systemd-resolved.service | Network Name Resolution manager |
| systemd-socket-proxyd | Bidirectionally proxy local sockets to another (possibly remote) socket. |
| 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-sysv-generator | Unit generator for SysV init scripts |
| systemd-timedated.service | Time and date bus mechanism |
| systemd-tmpfiles | Creates, deletes and cleans up volatile and temporary files and directories |
| systemd-update-done.service | Mark /etc and /var fully updated |
| systemd-update-utmp.service | Write audit and utmp updates at bootup, runlevel changes and shutdown |
| systemd-user-sessions.service | Permit user logins after boot, prohibit user logins at shutdown |
| systemd-veritysetup-generator | Unit generator for integrity protected block devices |
| systemd-veritysetup@.service | Disk integrity protection logic |
| systemd-volatile-root.service | Make the root file system volatile |
| telinit | Change SysV runlevel |