查看CPU、内存、版本等系统信息
一：查看CPU
more /proc/cpuinfo | grep "model name" grep "model name" /proc/cpuinfo
如果觉得需要看的更加舒服
grep "model name" /proc/cpuinfo | cut -f2 -d:
[root@php ~]# more /proc/cpuinfo | grep "model name" model name : Intel(R) Xeon(R) Gold 6278C CPU @ 2.60GHz model name : Intel(R) Xeon(R) Gold 6278C CPU @ 2.60GHz [root@php ~]# grep "model name" /proc/cpuinfo model name : Intel(R) Xeon(R) Gold 6278C CPU @ 2.60GHz model name : Intel(R) Xeon(R) Gold 6278C CPU @ 2.60GHz [root@php ~]# grep "model name" /proc/cpuinfo | cut -f2 -d: Intel(R) Xeon(R) Gold 6278C CPU @ 2.60GHz Intel(R) Xeon(R) Gold 6278C CPU @ 2.60GHz [root@php ~]#
二：查看内存
grep MemTotal /proc/meminfo grep MemTotal /proc/meminfo | cut -f2 -d: free -m |grep "Mem" | awk '{print $2}'
三：查看cpu是32位还是64位
查看CPU位数(32 or 64)
[root@php ~]# getconf LONG_BIT 64 [root@php ~]# echo $HOSTTYPE x86_64 [root@php ~]# uname -a Linux php.viroyaltest.com 3.10.0-1062.1.1.el7.x86_64 #1 SMP Fri Sep 13 22:55:44 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux [root@php ~]#
四：查看当前linux的版本
[root@php ~]# more /etc/redhat-release CentOS Linux release 7.6.1810 (Core) [root@php ~]# cat /etc/redhat-release CentOS Linux release 7.6.1810 (Core) [root@php ~]#
五：查看内核版本
[root@php ~]# uname -r 3.10.0-1062.1.1.el7.x86_64 [root@php ~]# uname -a Linux php.viroyaltest.com 3.10.0-1062.1.1.el7.x86_64 #1 SMP Fri Sep 13 22:55:44 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux [root@php ~]#
六：查看当前时间
[root@php ~]# date Wed May 6 17:50:34 CST 2020 [root@php ~]#
七：查看硬盘和分区
[root@php ~]# df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 1.9G 0 1.9G 0% /dev tmpfs 1.9G 0 1.9G 0% /dev/shm tmpfs 1.9G 65M 1.8G 4% /run tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup /dev/vda1 40G 7.8G 30G 21% / tmpfs 379M 0 379M 0% /run/user/0 tmpfs 379M 0 379M 0% /run/user/1000 [root@php ~]# fdisk -l Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos Disk identifier: 0x000af5dd Device Boot Start End Blocks Id System /dev/vda1 * 2048 83886079 41942016 83 Linux [root@php ~]#
可以看到全部占用的空间
[root@php /]# du -sh 查看当前目录空间 du: cannot access ‘./proc/5242/task/5242/fd/4’: No such file or directory du: cannot access ‘./proc/5242/task/5242/fdinfo/4’: No such file or directory du: cannot access ‘./proc/5242/fd/3’: No such file or directory du: cannot access ‘./proc/5242/fdinfo/3’: No such file or directory 7.8G . [root@php /]# du /etc -sh 查看指定目录空间 39M /etc [root@php /]# du -h --max-depth=1 / 查看/目录下每个文件的空间 16K /lost+found 0 /dev 39M /etc 65M /run 3.8G /usr 4.0K /srv 200M /CloudResetPwdUpdateAgent 1014M /opt 74M /path 6.1M /home 0 /sys 365M /root 534M /var 4.0K /mnt 1.7G /data du: cannot access ‘/proc/5318/task/5318/fd/4’: No such file or directory du: cannot access ‘/proc/5318/task/5318/fdinfo/4’: No such file or directory du: cannot access ‘/proc/5318/fd/3’: No such file or directory du: cannot access ‘/proc/5318/fdinfo/3’: No such file or directory 0 /proc 2.3M /CloudrResetPwdAgent 4.0K /media 116K /tmp 208M /boot 7.8G / [root@php /]#
八：查看安装的软件包
查看系统安装的时候装的软件包
cat -n /root/install.log more /root/install.log | wc -l
查看现在已经安装了那些软件包
[root@php /]# rpm -qa libXdamage-1.1.4-4.1.el7.x86_64 libssh2-1.8.0-3.el7.x86_64 libXt-devel-1.1.5-3.el7.x86_64 ncurses-base-5.9-14.20130511.el7_4.noarch libXinerama-1.1.3-2.1.el7.x86_64 rpm-python-4.11.3-40.el7.x86_64 urw-base35-z003-fonts-20170801-10.el7.noarch e2fsprogs-libs-1.42.9-16.el7.x86_64 basesystem-10.0-7.el7.centos.noarch . . . .
[root@php /]# rpm -qa | wc -l 691 [root@php /]# yum list installed | wc -l 691 [root@php /]#
九：查看键盘布局
cat /etc/sysconfig/keyboard cat /etc/sysconfig/keyboard | grep KEYTABLE | cut -f2 -d=
十：查看selinux情况
[root@php /]# sestatus SELinux status: disabled [root@php /]# sestatus | cut -f2 -d: disabled [root@php /]#
十一：查看ip，mac地址
在ifcfg-eth0 文件里你可以看到mac，网关等信息。
[root@node2 ~]# ifconfig br-8cf1758f9112: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 172.19.0.1 netmask 255.255.0.0 broadcast 172.19.255.255 inet6 fe80::42:72ff:fe39:ef18 prefixlen 64 scopeid 0x20<link> ether 02:42:72:39:ef:18 txqueuelen 0 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 br-dd12bfd88f23: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 172.18.0.1 netmask 255.255.0.0 broadcast 172.18.255.255 ether 02:42:e6:e9:88:3d txqueuelen 0 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255 ether 02:42:bb:f9:f7:86 txqueuelen 0 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.1.211 netmask 255.255.255.0 broadcast 192.168.1.255 inet6 fe80::a7c5:38ce:c1bd:7f88 prefixlen 64 scopeid 0x20<link> ether 00:0c:29:42:49:f0 txqueuelen 1000 (Ethernet) RX packets 2988 bytes 239919 (234.2 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 121 bytes 14059 (13.7 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (Local Loopback) RX packets 64 bytes 5472 (5.3 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 64 bytes 5472 (5.3 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 [root@node2 ~]#
[root@node2 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33 | grep IPADDR IPADDR=192.168.1.211 [root@node2 ~]#
[root@node2 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33 | grep IPADDR | cut -f2 -d= 192.168.1.211 [root@node2 ~]#
ifconfig cat /etc/sysconfig/network-scripts/ifcfg-eth0 | grep IPADDR cat /etc/sysconfig/network-scripts/ifcfg-eth0 | grep IPADDR | cut -f2 -d= ifconfig eth0 |grep "inet addr:" |awk '{print $2}'|cut -c 6- ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1}'
查看网关
cat /etc/sysconfig/network
查看dns
[root@node2 ~]# cat /etc/resolv.conf # Generated by NetworkManager search test.com nameserver 8.8.8.8 nameserver 8.8.8.4 [root@node2 ~]#
十二：查看默认语言
[root@node2 ~]# echo $LANG $LANGUAGE en_US.UTF-8 [root@node2 ~]# cat /etc/sysconfig/i18n cat: /etc/sysconfig/i18n: No such file or directory [root@node2 ~]#
十三：查看所属时区和是否使用UTC时间
timedatectl 命令 (1) 读取时间，查看时间的各种状态 timedatectl #等同于 timedatectl status (2) 设置时间 timedatectl set-time "YYYY-MM-DD HH:MM:SS" (3) 列出所有时区 timedatectl list-timezones (4) 设置系统时区为上海 timedatectl set-timezone Asia/Shanghai (5) 是否NTP服务器同步 timedatectl set-ntp yes #yes或者no ntpdate -u ntp.api.bz #同步网络时间 (6) 将硬件时钟调整为与本地时钟一致 timedatectl set-local-rtc 1 hwclock --systohc --localtime #与上面命令效果一致
注意: 硬件时钟默认使用UTC时间，因为硬件时钟不能保存时区和夏令时调整，修改后就无法从硬件时钟中读取出准确标准时间，因此不建议修改。
十四：查看主机名
[root@node2 ~]# hostname node2.test.com [root@node2 ~]# cat /etc/sysconfig/network # Created by anaconda [root@node2 ~]#
修改主机名就是修改这个文件，同时最好也把host文件也修改
[root@php ~]# more /proc/cpuinfo | grep "model name"model name: Intel(R) Xeon(R) Gold 6278C CPU @ 2.60GHzmodel name: Intel(R) Xeon(R) Gold 6278C CPU @ 2.60GHz
