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linux_wiki:boot_systems_into_different_targets_manually [2016/02/29 21:23] billdozor |
linux_wiki:boot_systems_into_different_targets_manually [2019/05/25 23:50] (current) |
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| **General Information** | **General Information** | ||
| - | About this page/ | + | There are no longer runlevels; systemd uses " |
| ---- | ---- | ||
| + | |||
| + | ===== Systemd Units ===== | ||
| Unit configuration file locations | Unit configuration file locations | ||
| Line 11: | Line 13: | ||
| * / | * / | ||
| + | \\ | ||
| Show available unit types | Show available unit types | ||
| <code bash> | <code bash> | ||
| systemctl -t help | systemctl -t help | ||
| </ | </ | ||
| + | |||
| + | ---- | ||
| + | |||
| + | ===== Systemd Targets ===== | ||
| Some common targets | Some common targets | ||
| * poweroff.target => power off the system | * poweroff.target => power off the system | ||
| - | * emergency.target => single user (root), | + | * emergency.target => single user (root), root file system |
| * Used if the system cannot be repaired in rescue.target | * Used if the system cannot be repaired in rescue.target | ||
| - | * rescue.target => single user environment (root), mount file systems | + | * rescue.target => single user environment (root), mount local file systems, with minimum services loaded, no network |
| * multi-user.target => Multi-user non-graphical, | * multi-user.target => Multi-user non-graphical, | ||
| * graphical.target => GUI environment, | * graphical.target => GUI environment, | ||
| * reboot.target => reboot the system | * reboot.target => reboot the system | ||
| - | Current target | + | \\ |
| + | What targets are currently active? | ||
| + | <code bash> | ||
| + | systemctl -t target | ||
| + | </ | ||
| + | * Look for either emergency, rescue, multi-user, or graphical. | ||
| + | * **Note**: If you are in the graphical target, multi-user will also be active, since multi-user is a dependency of graphical. | ||
| + | |||
| + | \\ | ||
| + | Current | ||
| <code bash> | <code bash> | ||
| systemctl get-default | systemctl get-default | ||
| </ | </ | ||
| + | \\ | ||
| Set default to graphical target | Set default to graphical target | ||
| <code bash> | <code bash> | ||
| Line 35: | Line 52: | ||
| </ | </ | ||
| + | \\ | ||
| List loaded unit files (systemctl) of type target (--type=target) whether they are active or not (--all) | List loaded unit files (systemctl) of type target (--type=target) whether they are active or not (--all) | ||
| <code bash> | <code bash> | ||
| Line 43: | Line 61: | ||
| * --all => show all loaded unit files, even if they are not active | * --all => show all loaded unit files, even if they are not active | ||
| + | \\ | ||
| List all installed unit files on the system | List all installed unit files on the system | ||
| <code bash> | <code bash> | ||
| Line 48: | Line 67: | ||
| </ | </ | ||
| + | \\ | ||
| View a target' | View a target' | ||
| <code bash> | <code bash> | ||
| Line 54: | Line 74: | ||
| * List what will start upon entering multi-user.target | * List what will start upon entering multi-user.target | ||
| + | \\ | ||
| Move from graphical target to multi-user (command prompt) | Move from graphical target to multi-user (command prompt) | ||
| <code bash> | <code bash> | ||
| Line 62: | Line 83: | ||
| ---- | ---- | ||
| - | ==== Other Systemctl Commands ==== | + | ===== Other Systemctl Commands |
| - | **Note:**By default, systemctl commands will only show the active configuration files unless you pass the " | + | **Note:** By default, systemctl commands will only show the active configuration files unless you pass the " |
| * systemctl --type=service => list all loaded and active only service unit config files | * systemctl --type=service => list all loaded and active only service unit config files | ||
| Line 75: | Line 96: | ||
| ---- | ---- | ||
| - | ==== Boot to rescue mode ==== | + | ===== Boot to rescue mode ===== |
| To boot to something other than the default target, such as the rescue target, during boot: | To boot to something other than the default target, such as the rescue target, during boot: | ||