Redhat7:systemd
Systemd Command
The Systemd command is the system and service manager for linux. It has replaced upstart as the init system.
Systemd introduces the concept systemd units. The list of units is shown below:
| Available Systemd Unit Types | ||
|---|---|---|
| Service Unit | .service | A System Service |
| Target Unit | .target | A group of systemd units |
| Automount Unit | .automount | A file system automount point |
| Device Unit | .device | A device file recognized by the kernel |
| Mount Unit | .mount | A file system mount point |
| Path Unit | .path | A file or directory in a file system |
| Scope Unit | .scope | An externally created process |
| Slice Unit | .slice | A group of hierarchically organized units that manage system processes |
| Snapshot Unit | .snapshot | A saved state of the systemd manager |
| Socket Unit | .socket | An inter process communication socket |
| Swap Unit | .swap | A swap device or file |
| Timer Unit | .timer | A systemd timer |