centos can set automatic shutdown; in centos, you can use the shutdown command to set automatic shutdown. This command can be used to perform the shutdown process. When the parameter is set to "-h", you can set the automatic shutdown. Time, the syntax is "shutdown -h automatic shutdown time".
The operating environment of this article: centos 6.4 system, Dell G3 computer.
Can centos be set to automatically shut down?
Linux shutdown command can be used to perform the shutdown process and send messages to all programs being executed by the user before shutting down. Shutdown can also be used to restart the computer. .
Usage permissions: System administrator.
Syntax
shutdown [-t seconds] [-rkhncfF] time [message]
Parameter description:
-t seconds: Set the shutdown procedure after a few seconds.
-k : It will not actually shut down the computer, it will just send a warning message to all users.
-r : Shut down and then restart.
-h : Stop after shutdown.
-n: Instead of using normal procedures to shut down, forcefully kill all running programs and then shut down automatically.
-c : Cancel the shutdown action currently in progress.
-f: When shutting down, do not perform fsck action (check Linux file system).
-F: When shutting down, force the fsck action.
time: Set the shutdown time.
message : Warning message sent to all users.
Examples are as follows:
1: Shut down the Linux system immediately, where now is equivalent to the state of time 0
[root@db-server ~]# shutdown -h now
2: The system will restart after 2 minutes, Where m means shut down or turn on the computer after a few minutes.
[root@db-server ~]# shutdown -r +2
3: Set the system to shut down at that point in time
[root@db-server ~]# shutdown -h 12:30
or execute it in the background
[root@db-server ~]# shutdown -h 12:30 &
It is best to use the command & to process the shutdown command in the background. It does not affect other current operations.
Recommended tutorial: "centos tutorial"
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CentOS is an open source distribution based on RedHatEnterpriseLinux, focusing on stability and long-term support, suitable for a variety of server environments. 1. The design philosophy of CentOS is stable and suitable for web, database and application servers. 2. Use YUM as the package manager to release security updates regularly. 3. Simple installation, you can build a web server with a few commands. 4. Advanced features include enhanced security using SELinux. 5. Frequently asked questions such as network configuration and software dependencies can be debugged through nmcli and yumdeplist commands. 6. Performance optimization suggestions include tuning kernel parameters and using a lightweight web server.

CentOS is widely used in server management and web hosting. Specific methods include: 1) using yum and systemctl to manage the server, 2) install and configure Nginx for web hosting, 3) use top and mpstat to optimize performance, 4) correctly configure the firewall and manage disk space to avoid common problems.

CentOS is a stable, enterprise-grade Linux distribution suitable for server and enterprise environments. 1) It is based on RedHatEnterpriseLinux and provides a free, open source and compatible operating system. 2) CentOS uses the Yum package management system to simplify software installation and updates. 3) Support advanced automation management, such as using Ansible. 4) Common errors include package dependency and service startup issues, which can be solved through log files. 5) Performance optimization suggestions include the use of lightweight software, regular cleaning of the system and optimization of kernel parameters.

Alternatives to CentOS include RockyLinux, AlmaLinux, OracleLinux, and SLES. 1) RockyLinux and AlmaLinux provide RHEL-compatible binary packages and long-term support. 2) OracleLinux provides enterprise-level support and Ksplice technology. 3) SLES provides long-term support and stability, but commercial licensing may increase costs.

Alternatives to CentOS include UbuntuServer, Debian, Fedora, RockyLinux, and AlmaLinux. 1) UbuntuServer is suitable for basic operations, such as updating software packages and configuring the network. 2) Debian is suitable for advanced usage, such as using LXC to manage containers. 3) RockyLinux can optimize performance by adjusting kernel parameters.

The CentOS shutdown command is shutdown, and the syntax is shutdown [Options] Time [Information]. Options include: -h Stop the system immediately; -P Turn off the power after shutdown; -r restart; -t Waiting time. Times can be specified as immediate (now), minutes ( minutes), or a specific time (hh:mm). Added information can be displayed in system messages.

The key differences between CentOS and Ubuntu are: origin (CentOS originates from Red Hat, for enterprises; Ubuntu originates from Debian, for individuals), package management (CentOS uses yum, focusing on stability; Ubuntu uses apt, for high update frequency), support cycle (CentOS provides 10 years of support, Ubuntu provides 5 years of LTS support), community support (CentOS focuses on stability, Ubuntu provides a wide range of tutorials and documents), uses (CentOS is biased towards servers, Ubuntu is suitable for servers and desktops), other differences include installation simplicity (CentOS is thin)

Steps to configure IP address in CentOS: View the current network configuration: ip addr Edit the network configuration file: sudo vi /etc/sysconfig/network-scripts/ifcfg-eth0 Change IP address: Edit IPADDR= Line changes the subnet mask and gateway (optional): Edit NETMASK= and GATEWAY= Lines Restart the network service: sudo systemctl restart network verification IP address: ip addr


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