View the installed CentOS version information:
cat /etc/issue View version
cat Abbreviation concatenate The cat command can be used to display and merge files.
CentOS release 6.6 (Final)
CentOS release 6.6
etc In the early days, the English abbreviation of etc was etcetera, and later everyone became more accustomed to calling it Editable Text Configuration. ETC is the system configuration file directory, which contains system startup scripts, startup configuration files, user login configuration files, network configuration files, httpd configuration files, IPSec configuration files and other files.
cat /etc/redhat-release View CentOS version
proc is the abbreviation of process, which stores kernel-related files .
Display results:
Linux version 2.6.32-504.12.2.el6.x86_64 (mockbuild@c6b9.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-11) (GCC) ) #1 SMP Wed Mar 11 22:03:14 UTC 2015
We can see that the system uses the Linux 2.6.32 kernel with 64 operating system. GCC is the GUN compiler collection, using version 4.4.5.
uname -a displays as follows
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RedHat shut down CentOS8.x and launches CentOSStream because it hopes to provide a platform closer to the RHEL development cycle through the latter. 1. CentOSStream, as the upstream development platform of RHEL, adopts a rolling release mode. 2. This transformation aims to enable the community to get exposure to new RHEL features earlier and provide feedback to accelerate the RHEL development cycle. 3. Users need to adapt to changing systems and reevaluate system requirements and migration strategies.

CentOS stands out among enterprise Linux distributions because of its stability, security, community support and enterprise application advantages. 1. Stability: The update cycle is long and the software package has been strictly tested. 2. Security: Inherit the security features of RHEL, update and announce in a timely manner. 3. Community support: a huge community and detailed documentation to respond to problems quickly. 4. Enterprise applications: Support container technologies such as Docker, suitable for modern application deployment.

Alternatives to CentOS include AlmaLinux, RockyLinux, and OracleLinux. 1.AlmaLinux provides RHEL compatibility and community-driven development. 2. RockyLinux emphasizes enterprise-level support and long-term maintenance. 3. OracleLinux provides Oracle-specific optimization and support. These alternatives have similar stability and compatibility to CentOS, and are suitable for users with different needs.

CentOS is suitable for enterprise and server environments due to its stability and long life cycle. 1.CentOS provides up to 10 years of support, suitable for scenarios that require stable operation. 2.Ubuntu is suitable for environments that require quick updates and user-friendly. 3.Debian is suitable for developers who need pure and free software. 4.Fedora is suitable for users who like to try the latest technologies.

Alternatives to CentOS include AlmaLinux, RockyLinux, and OracleLinux. 1.AlmaLinux and RockyLinux rebuild RHEL 1:1, providing high stability and compatibility, suitable for enterprise environments. 2. OracleLinux provides high performance through UEK, suitable for users who are familiar with the Oracle technology stack. 3. When choosing, stability, community support and package management should be considered.

CentOS alternatives include RockyLinux, AlmaLinux, and OracleLinux. 1. RockyLinux and AlmaLinux provide stable distributions compatible with RHEL, suitable for users who need long-term support. 2. CentOSStream is suitable for users who focus on new features and development cycles. 3. OracleLinux is suitable for users who need enterprise-level support.

CentOS needs alternatives because CentOSStream no longer provides long-term support. Alternative options include: 1. RockyLinux, which provides 10 years of life cycle support, suitable for users who need stability. 2.AlmaLinux also provides 10 years of support and has strong community support. 3. OracleLinux, provides RHEL-compatible version, and flexible life cycle management.

The end of CentOS has had a significant impact on users, with users having the option of RHEL, AlmaLinux, Debian or Ubuntu as alternatives. 1. The migration cost is high, requiring time and money. 2. Community division affects open source projects. 3.RHEL provides commercial support, but it is costly. 4.AlmaLinux is similar to CentOS and has low migration costs. 5. Debian and Ubuntu need more time to adapt.


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