Introduction to reboot command in Linux

Introduction to the reboot command in Linux and code examples

Title: Introduction to the reboot command in Linux and examples

Introduction:
In the Linux system, reboot is a very important command. It is used to restart the system. Whether on a server or a personal computer, the reboot command is essential. This article will introduce readers to the usage of the reboot command and related code examples.

1. Overview of the reboot command
The reboot command is used to restart the Linux operating system. When we need to update the kernel or configuration files, or when there is a problem with the system, the reboot command allows us to safely restart the system and restore it to normal state.

2. Syntax of reboot command
The basic syntax of reboot command is as follows:

reboot [选项]

Common options:

• -f: mandatory Restart without confirmation.
• -n: Avoid running shutdown scripts.
• -w: Only replaces the boot logo file and does not actually restart.

3. Examples of reboot command

1. Basic restart
   The simplest way to restart is to use the reboot command directly without any options.

   reboot

   Copy after login

   The system will automatically perform a restart operation and return to the startup phase of the operating system.

2. Force restart
   If the system currently has unsaved data or a program is running, the system will prompt the user to save the data and close the program. But if you are sure that you have saved all the data or cannot do it manually, you can use the force restart option.

   reboot -f

   Copy after login

   Copy after login

   The -f option will force a system restart and ignore unfinished tasks.

3. Close all programs and then restart
   You can use the shutdown command to restart the system after a period of time and close all running programs during this period. First, use the following command to set the restart time:

   shutdown -r +5

   Copy after login

   The above command will cause the system to restart after 5 minutes. Next, use the reboot command to restart immediately:

   reboot -f

   Copy after login

   Copy after login

   This way the system will safely close all programs and restart after 5 minutes.

4. Do not execute any commands after restarting
   Sometimes, we just want to restart the system without executing any commands. You can use the following command:

   reboot -n

   Copy after login

   The system will restart but will not enter the shutdown script.

5. Replace the boot logo file
   Sometimes, we only want to replace the boot logo file without restarting the system. You can use the following command:

   reboot -w

   Copy after login

   In this way, the system will update the boot flag file, but it will not actually restart.

   Conclusion:
   This article introduces readers to the important reboot command in the Linux system, as well as its usage and code examples. By using the reboot command properly, we can return to normal when a system problem occurs, or restart the system when the kernel or configuration files need to be updated. I hope this article can help readers in Linux system management and maintenance.

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