查看Linux内核版本及发行版本「建议收藏」

$ uname -sr
Linux 4.15.11-1.el7.elrepo.x86_64

$ uname -a
Linux localhost.localdomain 4.15.11-1.el7.elrepo.x86_64 #1 SMP Mon Mar 19 11:46:06 EDT 2018 x86_64 x86_64 x86_64 GNU/Linux

$ cat /proc/version
Linux version 4.15.11-1.el7.elrepo.x86_64 (mockbuild@Build64R7) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC)) #1 SMP Mon Mar 19 11:46:06 EDT 2018

# cat /etc/os-release
NAME="CentOS Linux"
VERSION="8 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="8"
PLATFORM_ID="platform:el8"
PRETTY_NAME="CentOS Linux 8 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:8"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-8"
CENTOS_MANTISBT_PROJECT_VERSION="8"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="8"

$ yum install -y redhat-lsb-core

$ lsb_release -a
LSB Version:    :core-4.1-amd64:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch
Distributor ID: CentOS
Description:    CentOS Linux release 7.4.1708 (Core)
Release:        7.4.1708
Codename:       Core

$ cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)

$ cat /etc/centos-release
CentOS Linux release 8.2.2004 (Core) 

$ cat /etc/system-release
Fedora release 27 (Twenty Seven)

$ apt-get install lsb-core

$ lsb_release -a
LSB Version:    core-9.20170808ubuntu1-noarch:security-9.20170808ubuntu1-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.2 LTS
Release:        18.04
Codename:       bionic

$ cat /etc/issue
Debian GNU/Linux 10 \n \l

$ cat /etc/issue.net
Debian GNU/Linux 10 

$ cat /etc/debian_version
10.8