In Red Hat-based Linux distributions, the runlevel command is used to display the previous and current runlevels of the system. Runlevels define the operating state of the system, indicating whether it is running in single-user mode, multi-user mode, or rebooting. However, please note that recent versions of Linux, including Red Hat-based distributions, often use systemd instead of traditional runlevels for managing services and system states. Here’s a table with information and examples related to the runlevel command:
| Command | Description | Example |
|---|---|---|
runlevel | Display previous and current runlevels | runlevel |
who -r | Display current runlevel and other information | who -r |
Examples:
- Display the previous and current runlevels:
runlevelThe output might be something like: N 3, indicating that the previous runlevel was “N” (none) and the current runlevel is “3”.
- Display the current runlevel and other information using the
who -rcommand:
who -rThe output provides information about the current runlevel, last system reboot time, and more.
Keep in mind that modern Linux distributions often use systemd, which provides more advanced and flexible control over services and system states compared to traditional runlevels. As a result, the use of runlevel might be less common in these systems.
