1、/proc 文件夹 是内存信息不占用磁盘空间
lscpu //查看cpu信息
cat /proc/cpuinfo //查看cpu信息
cat /proc/meninfo // 查看内存大小
free //查看内存大小
lsblk //查看硬盘
cat /proc /partitions //查看硬盘
2、uname -r //查看版本内核
红帽系列 ： cat /etc/os-release // centos7\8 ubuntu 用这个命令查看版本儿
cat /etc/redhat-release //cetnos6 查看
3、
[root@centos8 ~]#uname -r
4.18.0-147.el8.x86_64
[root@centos7 ~]#uname -r
3.10.0-1062.el7.x86_64
[root@centos6 ~]# uname -r
2.6.32-754.el6.x86_64
[root@ubuntu1804 ~]#uname -r
4.15.0-29-generic
#CentOS8 查看发行版本
[root@centos8 ~]#cat /etc/redhat-release
CentOS Linux release 8.1.1911 (Core)
[root@centos8 ~]#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/"
范例：
CENTOS_MANTISBT_PROJECT="CentOS-8"
CENTOS_MANTISBT_PROJECT_VERSION="8"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="8"
[root@centos8 ~]#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
[root@centos8 ~]#
#ubuntu查看发行版本
[root@ubuntu1804 ~]#cat /etc/os-release
NAME="Ubuntu"
VERSION="18.04.1 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.1 LTS"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-
policy"
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionic
[root@ubuntu1804 ~]#cat /etc/is
iscsi/ issue issue.net
[root@ubuntu1804 ~]#cat /etc/is
iscsi/ issue issue.net
[root@ubuntu1804 ~]#cat /etc/issue
Ubuntu 18.04.1 LTS \n \l
[root@ubuntu1804 ~]#lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Codename: bionic
[root@ubuntu1804 ~]#
