Linux下怎么查看系统版本号信息

在Linux系统中，我们可以使用一下命令来查看系统版本号信息：

1. cat /proc/version

2. uname -a

3. lsb_release -a

4. /etc/issue

5. /etc/*-release

6. hostnamectl

7. dmidecode -s bios-version

8. rpm -qf /etc/redhat-release

9. systemctl

第一种方法是使用cat命令来查看/proc/version文件，这个文件包含了当前系统的内核版本信息，如下所示：

[root@localhost ~]# cat /proc/version

Linux version 4.18.0-80.11.1.el8_0.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 8.3.1 20190507 (Red Hat 8.3.1-4) (GCC) ) #1 SMP Wed Sep 11 15:49:46 UTC 2019

第二种方法是使用uname命令，该命令可以查看当前系统的内核版本、操作系统版本、主机名称等信息，如下所示：

[root@localhost ~]# uname -a

Linux localhost.localdomain 4.18.0-80.11.1.el8_0.x86_64 #1 SMP Wed Sep 11 15:49:46 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

第三种方法是使用lsb_release命令，该命令可以查看当前系统的发行版本信息，如下所示：

[root@localhost ~]# lsb_release -a

LSB Version: :core-4.1-amd64:core-4.1-noarch

Distributor ID: CentOS

Description: CentOS Linux release 8.1.1911 (Core)

Release: 8.1.1911

Codename: Core

第四种方法是使用/etc/issue文件，该文件包含了当前系统的发行版本信息，如下所示：

[root@localhost ~]# cat /etc/issue

CentOS Linux release 8.1.1911 (Core)

Kernel \r on an \m (\l)

第五种方法是使用/etc/*-release文件，该文件包含了当前系统的发行版本信息，如下所示：

[root@localhost ~]# cat /etc/centos-release

CentOS Linux release 8.1.1911 (Core)

第六种方法是使用hostnamectl命令，该命令可以查看当前系统的主机名称、域名、内核版本等信息，如下所示：

[root@localhost ~]# hostnamectl

Static hostname: localhost.localdomain

Icon name: computer-vm

Chassis: vm

Machine ID: 9faa44cdb2b54f0a9e55f1a29c1a54f6

Boot ID: 4df2e63744d24a759e775b7cf6a61824

Virtualization: vmware

Operating System: CentOS Linux 8 (Core)

CPE OS Name: cpe:/o:centos:centos:8

Kernel: Linux 4.18.0-80.11.1.el8_0.x86_64

Architecture: x86-64

第七种方法是使用dmidecode命令，该命令可以查看当前系统的bios版本信息，如下所示：

[root@localhost ~]# dmidecode -s bios-version

2.6.5

第八种方法是使用rpm命令，该命令可以查看当前系统的发行版本信息，如下所示：

[root@localhost ~]# rpm -qf /etc/redhat-release

centos-release-8-1.1911.0.9.el8.x86_64

第九种方法是使用systemctl命令，该命令可以查看当前系统的启动时间、运行时间等信息，如下所示：

[root@localhost ~]# systemctl

UNIT LOAD ACTIVE SUB JOB DESCRIPTION

proc-sys-fs-binfmt_misc.automount loaded active waiting Arbitrary Executable File Formats File System Automount Point

sys-devices-platform-serial8250-tty-ttyS0.device loaded active plugged /dev/ttyS0

sys-devices-platform-serial8250-tty-ttyS1.device loaded active plugged /dev/ttyS1

-.mount loaded active mounted /

systemd-ask-password-console.path loaded active waiting Dispatch Password Requests to Console Directory Watch

systemd-ask-password-wall.path loaded active waiting Dispatch Password Requests to Wall Directory Watch

systemd-binfmt.service loaded active running Arbitrary Executable File Formats File System Checker

systemd-journald.service loaded active running Journal Service

systemd-logind.service loaded active running Login Service

systemd-remount-fs.service loaded active exited Remount Root and Kernel File Systems

systemd-sysctl.service loaded active exited Apply Kernel Variables

systemd-tmpfiles-setup.service loaded active exited Create Volatile Files and Directories

systemd-udev-trigger.service loaded active exited udev Coldplug all Devices

systemd-udevd.service loaded active running udev Kernel Device Manager

LOAD = Reflects whether the unit definition was properly loaded.

ACTIVE = The high-level unit activation state, i.e. generalization of SUB.

SUB = The low-level unit activation state, values depend on unit type.

JOB = Pending job for the unit.

JOB = Unit has no pending jobs.

LOAD = Reflects whether the unit definition was properly loaded.

ACTIVE = The high-level unit activation state, i.e. generalization of SUB.

SUB = The low-level unit activation state, values depend on unit type.

JOB = Pending job for the unit.

JOB = Unit has no pending jobs.

5 loaded units listed.

Pass --all to see loaded but inactive units, too.

To show all installed unit files use 'systemctl list-unit-files'.

root@localhost ~]#