centos, also known as "community enterprise operating system", is a free, open source, and redistributable open source operating system; it is a recompiled version of Red Hat Enterprise Linux, the leader in enterprise Linux distributions, and can be used Build an enterprise-level Linux system environment.
#The operating environment of this tutorial: centos7 system, thinkpad t480 computer.
CentOS is the abbreviation of Community Enterprise Operating System, also called community enterprise operating system.
CentOS Linux distribution is a stable, predictable, manageable and reproducible platform. It is a recompilation of Red Hat Enterprise Linux (hereinafter referred to as RHEL), the leader in enterprise Linux distributions. version (it is a re-released version), and many known bugs have been corrected on the basis of RHEL. Compared with other Linux distributions, its stability is trustworthy.
CentOS is free. You can use it to build an enterprise-level Linux system environment just like RHEL, but you do not need to pay any fees to RedHat. CentOS technical support is mainly provided through the community's official mailing list, forums and chat rooms.
Each version of CentOS is supported (via security updates) for ten years, with new versions of CentOS released approximately every two years. Each version of CentOS is updated regularly (about every six months) to support new hardware. In this way, a secure, low-maintenance, stable, highly predictable, and highly repeatable Linux environment is established.
System features:
1. CentOS can be understood as the community version of the Red Hat AS series. It is completely improved and released on Red Hat AS. Various operations and uses are no different from RHEL.
2. CentOS is completely free, and there is no problem that RED HAT AS requires a serial number.
3. CentOS’s unique yum command supports online upgrades, which can update the system instantly. Unlike RHEL, which requires spending money to purchase support services.
4. CentOS has fixed many RHEL bugs.
5. CentOS version description: CentOS3.1 is equivalent to RED HAT AS3 Update1 CentOS3.4 is equivalent to RED HAT AS3 Update4 CentOS4.0 is equivalent to RED HAT AS4.
Extended information: The relationship between CentOS and RHEL
RHEL has two methods when it is released. One is a binary distribution method, and the other is a source code distribution method. Regardless of the distribution method, it can be obtained and redistributed for free. But if you use online upgrades (including patches) or consulting services, you must pay.
RHEL has always provided source code distribution. CentOS recompiles the source code released by RHEL to form a usable binary version. Since the source code of LINUX is GNU, it is legal to obtain the source code of RHEL and compile it into a new binary.
CentOS can get all the features of RHEL, even better software. However, CentOS does not provide commercial support to users, and of course it does not bear any commercial responsibility. If you are moving your RHEL to CentOS because you don't want to pay for RHEL upgrades.
Recommended: "centos usage tutorial"
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What Comes After CentOS: The Road AheadApr 16, 2025 am 12:07 AMAlternatives 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.
CentOS: Exploring the AlternativesApr 15, 2025 am 12:03 AMAlternatives 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.
Centos shutdown command lineApr 14, 2025 pm 09:12 PMThe 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.
Difference between centos and ubuntuApr 14, 2025 pm 09:09 PMThe 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)
Centos configuration IP addressApr 14, 2025 pm 09:06 PMSteps 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
How to install centosApr 14, 2025 pm 09:03 PMCentOS installation steps: Download the ISO image and burn bootable media; boot and select the installation source; select the language and keyboard layout; configure the network; partition the hard disk; set the system clock; create the root user; select the software package; start the installation; restart and boot from the hard disk after the installation is completed.
Centos8 restarts sshApr 14, 2025 pm 09:00 PMThe command to restart the SSH service is: systemctl restart sshd. Detailed steps: 1. Access the terminal and connect to the server; 2. Enter the command: systemctl restart sshd; 3. Verify the service status: systemctl status sshd.
How to restart the network in centos8Apr 14, 2025 pm 08:57 PMRestarting the network in CentOS 8 requires the following steps: Stop the network service (NetworkManager) and reload the network module (r8169), start the network service (NetworkManager) and check the network status (by ping 8.8.8.8)
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