Linux system shutdown command, what is the Linux system restart command, what is the shutdown comman

In the Linux system, we generally use the following four ways to shut down, as follows:

1. Shutdown command.

The shutdown command is used to safely shut down a Linux system.

When the shutdown command is executed, the system notifies all logged-in users that the system is about to shut down, and the login command is frozen, that is, new users can no longer log in to the system. You can use the shutdown command to shut down the system directly, delay the specified time and shut down the system, or restart it. Deferring the system for a specified amount of time gives the user time to store the files they are currently working on and close the programs that have already been opened.

Some of the parameters of the shutdown command are as follows:

t] Specifies how long the system will be shut down.

r] Reboot the system.

k] doesn't really shut down, just sends a warning signal to each logged-in user.

h] Shut down the system.

2. halt command.

halt is the simplest shutdown command, which is actually called the shutdown -h command. When halt is executed, the application process is killed, and the kernel is stopped after the file system write operation is completed.

Some of the parameters of the halt command are as follows:

f] Shutdown or restart is not invoked to force a shutdown or restart.

i] Shut down all network interfaces before shutting down or restarting.

p] Invoke poweroff on shutdown, this option is the default.

3. reboot command.

The working process of Reboot is similar to that of HALT, its function is to restart, while HALT is to shut down. Its parameters are also similar to those of HALT.

4. init command.

init is the ancestor of all processes, and its process number is always the running level used to switch the system, and the switching work is done immediately. init

The 0 command is used to immediately switch the system operating level to 0, i.e., shut down; The init 6 command is used to switch the system running level to 6, i.e., reboot.

The Linux shutdown command can be used to perform the shutdown program and send a message to all the programs that the user is running before the shutdown, and the shutdown can also be used to restart the computer.

Permissions: System administrator.

Syntax: shutdown [-t seconds] [rkhncff] time [message].

Parameters: t seconds is set to perform the shutdown program after a few seconds.

k does not actually shut down, but only sends a warning message to all users.

r Turn it off and back on.

h Shut down after shutdown.

n Do not use normal programs to shut down, use forced methods to kill all the programs in execution and then shut down by itself.

c. Cancel the shutdown that is currently in progress.

f When the power is off, do not do the fsck action.

f When the power is off, the FSCK action is forced.

time sets the time for shutting down.

message A warning message sent to all users.

Example: Shut down immediately.

# shutdown -h now

Specify that the computer will be turned off after 10 minutes.

# shutdown -h 10

Restart your computer.

# shutdown -r now

Hello subject,The most commonly used shutdown command under Linux should be:

Poweroff or shutdown

There is also a less commonly used :

init 0

The shutdown command is as follows:Operating Equipment: Dell laptops.

Operating system: win10

Operating procedure: win+r running function.

1. Press "Win+R", WIN is generally a window-like logo button between CTRL and ALT at the bottom of the keyboard, press and hold Win, and then press the letter R key, a run dialog box will appear in the lower left corner of the computer, as shown in the following figure:

2. Enter "shutdown -s -t 600" in the column of the dialog box (note: quotation marks are not entered, there is a space in front of "-s", "-t" and "600", the number represents the time, the unit is seconds, as 600 represents 10 minutes) If you want to set the shutdown after a few days, calculate how many seconds there are at that time, and then replace the result with the above 600.

3. Then click "Confirm" to complete the setting. At this time, the system will pop up a system prompt dialog box, prompting that the system will shut down within 10 minutes, some computers may be bubbling on the right side of the taskbar, and it will disappear automatically after a few seconds, so pay attention to see if the display settings are correct.

What is the Linux system reboot command and what is the shutdown command.

Refer to the following:1Open the Linux and Ubuntu operating systems here, and open the terminal window on the left.

2.Directly enter the shutdown, and the system will prompt automatic shutdown after one minute.

3.If you type shutdown-c, the shutdown will be canceled.

4.Now after entering, close immediately as shown in the image below.

5.Click enter, and the machine will be turned off.

6.Be careful not to use spaces, or you'll get an error.

7.You can define a specific shutdown time.

Rebooting and shutting down a Linux system is actually a lot of learning.

Under Linux, there are shutdown, halt, reboot, and init for the shutdown and reboot of the system, and their internal working processes are different for them.

1. Shutdown command.

It can be used to safely shut down the system, however, when the system is shut down, all logged-in users will be notified that the system is about to shut down, and all instructions will be frozen, i.e. all new users can no longer log in, and using this command will result in an immediate shutdown or restart and a delay in shutting down or restarting for a certain period of time. (Note: Only superusers can use this command).

Command syntax format:

shutdown [Options] [Time] [Warning Message].

Description of the meaning of the options in this command:

k: Just send a warning message to the user.

r: Restart the system after shutting down the system.

h: Do not restart the system after shutting down the system.

F: Quickly shut down the system, but do not perform disk detection when restarting the system (during the experiment, it is found that the system enters the BIOS interface, but no operation can be performed).

n: Shut down the system quickly, but shut down without going through the init program.

c: Interrupt and shut down the system (I didn't find out how to experiment).

2. halt command.

To use the halt command is to call the "shutdown -h" command to shut down the system.

Command syntax format:

halt [option].

w: Not really shutting down the system, just writing "wtmp" (var log wtmp) records.

d: Don't write "wtmp".

f: Instead of calling "shutdown", force shutdown is called.

I: Before shutting down the system or restarting the system, close all network UO interfaces.

p: This option is the default option, call Power Off when the system is shut down

3. reboot command.

The reboot command works similarly to the halt command, but reboot causes the host to reboot. All its parameters are similar to "halt".

4. init command.

The init command uses the system's run-level control system. It is the ancestor of all system processes, and its process number is always 1, so sending a "term" signal to init will terminate all user processes, daemons, etc., and "shutdown" is used in this mechanism. init 0 is to shut down the system, and init 1 is to restart the system.

There are shutdown, halt, reboot, init for shutdown and reboot systems, and their internal working processes are different for them.

There is an article above about this in the Heatey.

There are five Linux shutdown commands, which are as follows:

1、shutdown。

2、poweroff。

3、init。

4、reboot。

5、halt。

First released on October 5, 1991 by Linus Bennadikht Tovaz, Linux's kernel is largely inspired by the ideas of Minix and Unix and is a multi-user, multi-tasking, multi-threaded and multi-CPU operating system based on Posix.

Related Features:Linux is not only a stable system performance, but also open-source software. Its core firewall components are efficient and easy to configure, ensuring the security of the system. In many enterprise networks, in order to pursue speed and security, Linux is not only used by network operation and maintenance personnel as a server, but even as a network firewall, which is a highlight of Linux.

Linux has the characteristics of open source, no copyright, and many users in the technical community, and open source allows users to freely tailor, with high flexibility, powerful functions, and low cost. In particular, the network protocol stack is embedded in the system, and the functions of the router can be realized after proper configuration. These features make Linux an ideal development platform for the development of routing and switching devices.

Linux CentOS shutdown command:

1. The halt is shut down immediately.

2. PowerOff shut down immediately.

3. shutdown -h now.

4. shutdown -h 10 automatic shutdown after 10 minutes.

If you use the shutdown command to set the shutdown command, you can use the shutdown -c command to cancel the shutdown.

System features:

1. Openness: The system follows the world's standards and specifications, especially the Open System Interconnection (OSI) international standard.

2. Multi-user: The system resources can be used by the same users, and each user has specific permissions for their own resources (e.g., files, devices) and affects each other.

3. Multitasking: It is a computer that executes multiple programs at the same time, and the operation of each program is independent of each other. Good user interface: Linux provides users with two interfaces: user interface and system calls.

4. User interface. It uses mouse, menus, windows, scrolling bars and other facilities to present users with an intuitive, easy-to-operate, interactive and friendly graphical interface.