一：查看cpu信息
more /proc/cpuinfo | grep "model name"
grep "model name" /proc/cpuinfo
grep "CPU" /proc/cpuinfo
grep "model name" /proc/cpuinfo | cut -f2 -d:
二：查看内存信息
grep MemTotal /proc/meminfo
grep MemTotal /proc/meminfo | cut -f2 -d:
grep MemTotal /proc/meminfo | free -m
grep MemTotal /proc/meminfo | grep "Mem"
grep MemTotal /proc/meminfo | awk '{print $2}'
三：查看cpu是32位还是64位
getconf LONG_BIT
四：查看当前linux的版本信息
cat /etc/issue #查看具体操作系统类型
more /etc/redhat-release
cat /etc/redhat-release
rpm -q centos-release
五：查看内核版本
uname -r
uname -a
六：查看系统当前时间
date
clock
clock -w #同步系统时间
七：查看硬盘和分区
df -h
fdisk -l
du -sh #查看当前目录占用空间大小
du /etc -sh #查看/etc目录占用空间大小
八：查看系统安装的软件包
cat -n /root/install.log #查看系统默认安装时的软件包
more /root/install.log | wc -l #查看当前系统安装的软件包数量
rpm -qa
rpm -qa | wc -l
yum list installed | wc -l
九：查看键盘布局
cat /etc/sysconfig/keyboard
cat /etc/sysconfig/keyboard | grep KEYTABLE | cut -f2 -d=
十：查看selinux是否关闭
sestatus
sestatus | cut -f2 -d:
cat /etc/sysconfig/selinux
十一：查看IP地址、网卡mac地址信息
ifconfig
cat /etc/sysconfig/network-scripts/ifcfg-eth0 | grep IPADDR
cat /etc/sysconfig/network-scripts/ifcfg-eth0 | cut -f2 -d=
cat /etc/sysconfig/network-scripts/ifcfg-eth0 | ifconfig eth0
cat /etc/sysconfig/network-scripts/ifcfg-eth0 | grep -v '127.0.0.1'
cat /etc/sysconfig/network-scripts/ifcfg-eth0 | cut -d: -f2
cat /etc/sysconfig/network-scripts/ifcfg-eth0 | awk '{ print $1}'
cat /etc/sysconfig/network
cat /etc/resolv.conf #查看DNS
十二：查看系统默认语言
echo $LANG $LANGUAGE
cat /etc/sysconfig/i18n
十二：查看所属时区和是否使用UTC时间
cat /etc/sysconfig/clock
十三：查看主机名
hostname
cat /etc/sysconfig/network
十四：查看系统开机运行时间
uptime
vmstat 1 -S m procs