查看linux系统版本相关信息

1.查看内核版本：cat /proc/version

A机器

root@debian:~# cat /proc/version
Linux version 3.10.--686 (ty@debian) (gcc version 4.7. (Debian 4.7.-) ) # SMP Sat Sep  :: EDT 2016

B机器

[root@bogon ~]# cat /proc/version
Linux version 3.10.-.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.  (Red Hat 4.8.-) (GCC) ) # SMP Thu Nov  :: UTC 

2.查看发行版本信息  cat /etc/*-release   或   cat /etc/issue

　A机器

root@debian:~# cat /etc/*-release
PRETTY_NAME="Debian GNU/Linux 7 (wheezy)"
NAME="Debian GNU/Linux"
VERSION_ID="7"
VERSION="7 (wheezy)"
ID=debian
ANSI_COLOR="1;31"
HOME_URL="http://www.debian.org/"
SUPPORT_URL="http://www.debian.org/support/"
BUG_REPORT_URL="http://bugs.debian.org/"

root@debian:~# cat /etc/issue
Debian GNU/Linux  \n \

B机器

[root@bogon ~]# cat /etc/*-release
CentOS Linux release 7.6.1810 (Core)
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

CentOS Linux release 7.6.1810 (Core)
CentOS Linux release 7.6.1810 (Core) 

从上面信息可以分析出

A机器：Debian 7 x86； B机器：CentOS 7 x86_64