diff --git a/sources/tech/20181009 6 Commands To Shutdown And Reboot The Linux System From Terminal.md b/sources/tech/20181009 6 Commands To Shutdown And Reboot The Linux System From Terminal.md deleted file mode 100644 index c119f69ebf..0000000000 --- a/sources/tech/20181009 6 Commands To Shutdown And Reboot The Linux System From Terminal.md +++ /dev/null @@ -1,331 +0,0 @@ -translating---cyleft -==== - -6 Commands To Shutdown And Reboot The Linux System From Terminal -====== -Linux administrator performing many tasks in their routine work. The system Shutdown and Reboot task also included in it. - -It’s one of the risky task for them because some times it wont come back due to some reasons and they need to spend more time on it to troubleshoot. - -These task can be performed through CLI in Linux. Most of the time Linux administrator prefer to perform these kind of tasks via CLI because they are familiar on this. - -There are few commands are available in Linux to perform these tasks and user needs to choose appropriate command to perform the task based on the requirement. - -All these commands has their own feature and allow Linux admin to use it. - -**Suggested Read :** -**(#)** [11 Methods To Find System/Server Uptime In Linux][1] -**(#)** [Tuptime – A Tool To Report The Historical And Statistical Running Time Of Linux System][2] - -When the system is initiated for Shutdown or Reboot. It will be notified to all logged-in users and processes. Also, it wont allow any new logins if the time argument is used. - -I would suggest you to double check before you perform this action because you need to follow few prerequisites to make sure everything is fine. - -Those steps are listed below. - - * Make sure you should have a console access to troubleshoot further in case any issues arise. VMWare access for VMs and IPMI/iLO/iDRAC access for physical servers. - * You have to create a ticket as per your company procedure either Incident or Change ticket and get approval - * Take the important configuration files backup and move to other servers for safety - * Verify the log files (Perform the pre-check) - * Communicate about your activity with other dependencies teams like DBA, Application, etc - * Ask them to bring down their Database service or Application service and get a confirmation from them. - * Validate the same from your end using the appropriate command to double confirm this. - * Finally reboot the system - * Verify the log files (Perform the post-check), If everything is good then move to next step. If you found something is wrong then troubleshoot accordingly. - * If it’s back to up and running, ask the dependencies team to bring up their applications. - * Monitor for some time, and communicate back to them saying everything is working fine as expected. - - - -This task can be performed using following commands. - - * **`shutdown Command:`** shutdown command used to halt, power-off or reboot the machine. - * **`halt Command:`** halt command used to halt, power-off or reboot the machine. - * **`poweroff Command:`** poweroff command used to halt, power-off or reboot the machine. - * **`reboot Command:`** reboot command used to halt, power-off or reboot the machine. - * **`init Command:`** init (short for initialization) is the first process started during booting of the computer system. - * **`systemctl Command:`** systemd is a system and service manager for Linux operating systems. - - - -### Method-1: How To Shutdown And Reboot The Linux System Using Shutdown Command - -shutdown command used to power-off or reboot a Linux remote machine or local host. It’s offering -multiple options to perform this task effectively. If the time argument is used, 5 minutes before the system goes down the /run/nologin file is created to ensure that further logins shall not be allowed. - -The general syntax is - -``` -# shutdown [OPTION] [TIME] [MESSAGE] - -``` - -Run the below command to shutdown a Linux machine immediately. It will kill all the processes immediately and will shutdown the system. - -``` -# shutdown -h now - -``` - - * **`-h:`** Equivalent to –poweroff, unless –halt is specified. - - - -Alternatively we can use the shutdown command with `halt` option to bring down the machine immediately. - -``` -# shutdown --halt now -or -# shutdown -H now - -``` - - * **`-H, --halt:`** Halt the machine. - - - -Alternatively we can use the shutdown command with `poweroff` option to bring down the machine immediately. - -``` -# shutdown --poweroff now -or -# shutdown -P now - -``` - - * **`-P, --poweroff:`** Power-off the machine (the default). - - - -Run the below command to shutdown a Linux machine immediately. It will kill all the processes immediately and will shutdown the system. - -``` -# shutdown -h now - -``` - - * **`-h:`** Equivalent to –poweroff, unless –halt is specified. - - - -If you run the below commands without time parameter, it will wait for a minute then execute the given command. - -``` -# shutdown -h -Shutdown scheduled for Mon 2018-10-08 06:42:31 EDT, use 'shutdown -c' to cancel. - -[email protected]# -Broadcast message from [email protected] (Mon 2018-10-08 06:41:31 EDT): - -The system is going down for power-off at Mon 2018-10-08 06:42:31 EDT! - -``` - -All other logged in users can see a broadcast message in their terminal like below. - -``` -[[email protected] ~]$ -Broadcast message from [email protected] (Mon 2018-10-08 06:41:31 EDT): - -The system is going down for power-off at Mon 2018-10-08 06:42:31 EDT! - -``` - -for Halt option. - -``` -# shutdown -H -Shutdown scheduled for Mon 2018-10-08 06:37:53 EDT, use 'shutdown -c' to cancel. - -[email protected]# -Broadcast message from [email protected] (Mon 2018-10-08 06:36:53 EDT): - -The system is going down for system halt at Mon 2018-10-08 06:37:53 EDT! - -``` - -for Poweroff option. - -``` -# shutdown -P -Shutdown scheduled for Mon 2018-10-08 06:40:07 EDT, use 'shutdown -c' to cancel. - -[email protected]# -Broadcast message from [email protected] (Mon 2018-10-08 06:39:07 EDT): - -The system is going down for power-off at Mon 2018-10-08 06:40:07 EDT! - -``` - -This can be cancelled by hitting `shutdown -c` option on your terminal. - -``` -# shutdown -c - -Broadcast message from [email protected] (Mon 2018-10-08 06:39:09 EDT): - -The system shutdown has been cancelled at Mon 2018-10-08 06:40:09 EDT! - -``` - -All other logged in users can see a broadcast message in their terminal like below. - -``` -[[email protected] ~]$ -Broadcast message from [email protected] (Mon 2018-10-08 06:41:35 EDT): - -The system shutdown has been cancelled at Mon 2018-10-08 06:42:35 EDT! - -``` - -Add a time parameter, if you want to perform shutdown or reboot in `N` seconds. Here you can add broadcast a custom message to logged-in users. In this example, we are rebooting the machine in another 5 minutes. - -``` -# shutdown -r +5 "To activate the latest Kernel" -Shutdown scheduled for Mon 2018-10-08 07:13:16 EDT, use 'shutdown -c' to cancel. - -[[email protected] ~]# -Broadcast message from [email protected] (Mon 2018-10-08 07:08:16 EDT): - -To activate the latest Kernel -The system is going down for reboot at Mon 2018-10-08 07:13:16 EDT! - -``` - -Run the below command to reboot a Linux machine immediately. It will kill all the processes immediately and will reboot the system. - -``` -# shutdown -r now - -``` - - * **`-r, --reboot:`** Reboot the machine. - - - -### Method-2: How To Shutdown And Reboot The Linux System Using reboot Command - -reboot command used to power-off or reboot a Linux remote machine or local host. Reboot command comes with two useful options. - -It will perform a graceful shutdown and restart of the machine (This is similar to your restart option which is available in your system menu). - -Run “reboot’ command without any option to reboot Linux machine. - -``` -# reboot - -``` - -Run the “reboot” command with `-p` option to power-off or shutdown the Linux machine. - -``` -# reboot -p - -``` - - * **`-p, --poweroff:`** Power-off the machine, either halt or poweroff commands is invoked. - - - -Run the “reboot” command with `-f` option to forcefully reboot the Linux machine (This is similar to pressing the power button on the CPU). - -``` -# reboot -f - -``` - - * **`-f, --force:`** Force immediate halt, power-off, or reboot. - - - -### Method-3: How To Shutdown And Reboot The Linux System Using init Command - -init (short for initialization) is the first process started during booting of the computer system. - -It will check the /etc/inittab file to decide the Linux run level. Also, allow users to perform shutdown and reboot the Linux machine. There are seven runlevels exist, from zero to six. - -**Suggested Read :** -**(#)** [How To Check All Running Services In Linux][3] - -Run the below init command to shutdown the system . - -``` -# init 0 - -``` - - * **`0:`** Halt – to shutdown the system. - - - -Run the below init command to reboot the system . - -``` -# init 6 - -``` - - * **`6:`** Reboot – to reboot the system. - - - -### Method-4: How To Shutdown The Linux System Using halt Command - -halt command used to power-off or shutdown a Linux remote machine or local host. -halt terminates all processes and shuts down the cpu. - -``` -# halt - -``` - -### Method-5: How To Shutdown The Linux System Using poweroff Command - -poweroff command used to power-off or shutdown a Linux remote machine or local host. Poweroff is exactly like halt, but it also turns off the unit itself (lights and everything on a PC). It sends an ACPI command to the board, then to the PSU, to cut the power. - -``` -# poweroff - -``` - -### Method-6: How To Shutdown And Reboot The Linux System Using systemctl Command - -Systemd is a new init system and system manager which was implemented/adapted into all the major Linux distributions over the traditional SysV init systems. - -systemd is compatible with SysV and LSB init scripts. It can work as a drop-in replacement for sysvinit system. systemd is the first process get started by kernel and holding PID 1. - -**Suggested Read :** -**(#)** [chkservice – A Tool For Managing Systemd Units From Linux Terminal][4] - -It’s a parent process for everything and Fedora 15 is the first distribution which was adapted systemd instead of upstart. - -systemctl is command line utility and primary tool to manage the systemd daemons/services such as (start, restart, stop, enable, disable, reload & status). - -systemd uses .service files Instead of bash scripts (SysVinit uses). systemd sorts all daemons into their own Linux cgroups and you can see the system hierarchy by exploring /cgroup/systemd file. - -``` -# systemctl halt -# systemctl poweroff -# systemctl reboot -# systemctl suspend -# systemctl hibernate - -``` - --------------------------------------------------------------------------------- - -via: https://www.2daygeek.com/6-commands-to-shutdown-halt-poweroff-reboot-the-linux-system/ - -作者：[Prakash Subramanian][a] -选题：[lujun9972][b] -译者：[译者ID](https://github.com/译者ID) -校对：[校对者ID](https://github.com/校对者ID) - -本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出 - -[a]: https://www.2daygeek.com/author/prakash/ -[b]: https://github.com/lujun9972 -[1]: https://www.2daygeek.com/11-methods-to-find-check-system-server-uptime-in-linux/ -[2]: https://www.2daygeek.com/tuptime-a-tool-to-report-the-historical-and-statistical-running-time-of-linux-system/ -[3]: https://www.2daygeek.com/how-to-check-all-running-services-in-linux/ -[4]: https://www.2daygeek.com/chkservice-a-tool-for-managing-systemd-units-from-linux-terminal/