CentOS View System Information commands and methods

Collect some Linux commands and methods for viewing system information:

One, Linux view server System Information method:

1. View host name/kernel version/CPU architecture:

1. # uname-n-r-p-o
2. Localhost.localdomain 2.6.32-220.el6.i686 i686

2. View the Linux system type and version:

1. # head-n 1/etc/issue
2. CentOS Release 6.2 (Final)

3. View language Character Set settings:

1. # echo $LANG $LANGUAGE
2. Zh_cn. UTF-8
3. # cat/etc/sysconfig/i18n
4. Lang= "ZH_CN. UTF-8 "

4. View Users:

1. # WhoAmI #查看当前登录用户名
2. # ID #查看当前用户及其属组
3. # W #查看当前登录的用户及运行的命令
4. # Last #查看最近登录用户
5. # cat/etc/passwd|awk-f: ' {print '} ' #查看服务器上面所有用户

5. View other System Information:

1. # date ' +%y-%m-%d%h:%m:%s ' #查看系统时间
2. # Ps-ef #查看运行进程
3. # uptime #查看服务器开机时长, number of users, average load
4. # Lsmod #查看所有加载的模块
5. # env #查系统环境变量
6. # crontab-l #查看计划任务

Second, Linux view server hardware device information:

1. View Server CPU Information:

1. # grep ' model name '/proc/cpuinfo|awk-f: ' {print $} ' |sed ' s# # #g ' |uniq-c
2. 8 Intel (R) Xeon (R) CPU E5630 @ 2.53GHz #8个核心的Intel Xeon CPU

2. View the number of server CPU bits:

1. # getconf Long_bit
2. 32

3. Check the network card model:

1. # LSPCI |grep Ethernet
2. Ethernet controller:broadcom Corporation netxtreme II BCM5709 Gigabit Ethernet (rev. 20)

4. View additional hardware information:

1. # Lspci-tv #查看所有PCI设备
2. # Lsusb-tv #查看所有usb外设
3. # Cat/etc/sysconfig/keyboard #查看键盘布局

Linux Learning, HTTP //linux.it.net.cn

Third, Linux view server storage information:

1. View memory Information:

1. # sed-n '/memtotal\| Memfree/p '/proc/meminfo
2. memtotal:16426736 KB
3. memfree:14171748 KB

2. View swap space:

1. # sed-n '/swaptotal\| Swapfree/p '/proc/meminfo
2. swaptotal:16771852 KB
3. swapfree:16771852 KB

3. View mount partition space usage:

1. # Df-h
2. File system capacity has been used with available% mount points
3. /dev/sda6 9.7G 570M 8.7G 7%/
4. /dev/sda7 3.9G 73M 3.7G 2%/tmp
5. /dev/sda2 20G 2.5G 16G 14%/var
6. /dev/sda8 388G 4.9G 363G 2%/storage
7. /dev/sda5 15G 2.4G 12G 18%/usr
8. /DEV/SDA1 92M 12M 75M 14%/boot
9. Tmpfs 7.9G 0 7.9G 0%/dev/shm

Iv. Linux View server network information:

1. View the Linux system hostname:

1. # hostname
2. Localhost.localdomain

2. View server IP address: It network, http://www.it.net.cn

1. # Ifconfig|grep ' inet addr: ' |grep-v ' 127.0.0.1 ' |cut-d:-f2|awk ' {print '} '
2. 192.168.17.238
3. 192.168.1.9

3. View the Linux gateway:

1. # route |grep Default
2. Default 192.168.1.1 0.0.0.0 UG 0 0 0 em1

4. View the Linux ports:

1. # NETSTAT-LNTP #查看监听 (Listen) port
2. # NETSTAT-ANTP #查看所有建立的TCP连接

5. View Linux Open service:

1. # chkconfig--list|grep Enable #查看开启的服务
2. sshd 0: Off 1: Off 2: Enable 3: Enable 4: Enable 5: Enable 6: Off
3. httpd 0: Off 1: Off 2: Off 3: Enabled 4: Off 5: off 6: Off

6. View Server DNS configuration:

1. # cat/etc/resolv.conf
2. NameServer 192.168.0.66
3. NameServer 202.106.0.20

7. Other Network information:

1. # Iptables-l #查看防火墙规则
2. # route-n #查看路由表
3. # netstat-s #查看网络统计信息

CentOS View System Information commands and methods