linux查看centos
Introduction: CentOS Overview
CentOS is an open-source operating system that is built on Red Hat Enterprise Linux (RHEL). It is a community-driven project that provides free enterprise-class software to its users. CentOS is a popular choice for web hosting, due to its stability, security, and support. In this article, we will discuss how to view CentOS using the Linux command line.
Viewing the CentOS Version
The first step in viewing CentOS using Linux is to determine which version of CentOS you are using. To do this, you can use the command:
cat /etc/centos-release
This command will display the version of CentOS installed on your system. For example, if you see "CentOS Linux release 7.9.2009" in the output, it means that you are running CentOS 7.
Checking System Information
If you want to view detailed information about your CentOS system, you can use the uname command. This command displays system information such as the kernel version, processor type, and operating system architecture. To use this command, type:
uname -a
The output of this command will display system information like the Linux kernel version, processor type, and operating system architecture. The information is useful for understanding which kernel version is installed on your system, which is critical for security updates.
System Resource Usage
If you want to view the current resource usage of your CentOS system, you can use the top command. This command displays real-time CPU and memory usage of your system. To use this command, type:
top
This command will display system processes running in real-time, and it will also show the CPU and memory usage of each process. The information is beneficial when troubleshooting issues with system performance or trying to optimize system resources.
Viewing Installed Packages
If you want to view a list of installed packages on your CentOS system, you can use the yum command. This command is used to install, remove, and update software packages on a CentOS system. To view the installed packages on your system, type:
yum list installed
This command will display a list of all installed software packages on your system, including their names, versions, and release numbers. It can help you keep track of the software installed on your system and facilitate package management.
Conclusion
Viewing CentOS using Linux command line is an essential skill for system administrators and developers. The commands discussed in this article can help you view system information, system resource usage, and installed packages. Knowing how to use these commands can help you troubleshoot issues and optimize your CentOS system's performance efficiently.