Difference: 1. Centos uses the "service httpd" command to start and shut down the service, and ubuntu uses the "/etc/init.d/apache" command to start and shut down the service; 2. Centos uses the "yum upgrade" command to upgrade the system, and ubuntu uses the "yum upgrade" command to upgrade the system. Use the "atp-get" command to upgrade.
The operating environment of this article: centos 7 system, Dell G3 computer.
What is the difference between ubuntu and centos commands
CentOS (Community ENTerprise Operating System) is one of the Linux distributions. It is a source released from Red Hat Enterprise Linux in accordance with open source code regulations. The code is compiled. Because it comes from the same source code, some servers that require high stability use CentOS instead of the commercial version of Red Hat Enterprise Linux.
Ubuntu is a Linux operating system mainly based on desktop applications. Ubuntu is based on the Debian distribution and the GNOME desktop environment. The difference from Debian is that it releases a new version every 6 months. The goal of Ubuntu is to provide general users with an up-to-date, yet fairly stable operating system that is primarily built with free software. Ubuntu has a huge community power, and users can easily get help from the community.
Both are service-level operating systems commonly used by individuals and small teams in the current version. Many open source software and libraries can be easily installed in the software libraries provided online. Both use bash as the basic shell, so in many basic commands, the difference between ubuntu and centos is not very obvious, and ubuntu does a better job in the desktop interface. It is the first choice for many people to learn Linux out of interest. Usually it is Ubuntu, after all, many people are still accustomed to operating under desktop graphics.
There are still many differences in usage habits and commands between Centos and Ubuntu. Here is a brief list:
1. The newly created non-root user in centos does not have sudo permissions. If necessary, To use sudo permissions, you must add accounts and permissions to /etc/sudoers, so when switching to the root account, you only need to enter: su and add the password of the root account.
In Ubuntu, the sudo command is generally used. If it is the first time you use it, you will be prompted to enter the current user's password (instead of the root password)
2. When installing software online, centos uses The yum command is used, while the apt-get command is used in ubuntu. In addition, there is a method in yum to search for a software from the software source. yum search software name
3. Centos comes from redhat, so centos supports installation in rpm format, while ubuntu obviously does not. Supported.
4. After all, different companies make different distributions. The locations of many configuration files and the default file paths are very different. This needs to be gradually realized during use.
The command differences are summarized in the following table:
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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