View system information in centos

1. View cpumore/proc/cpuinfo | grep & quot; modelname & quot;/proc/cpuinfo. grep & quot; modelname & quot;/proc/cpuinfo | cut-f2-d:

I. View cpu

More/proc/cpuinfo | grep "model name"
Grep "model name"/proc/cpuinfo

If you feel more comfortable to watch

Grep "model name"/proc/cpuinfo | cut-f2-d:

How about linux commands.

II. View Memory

Grep MemTotal/proc/meminfo

Grep MemTotal/proc/meminfo | cut-f2-d:

Free-m | grep "Mem" | awk '{print $2 }'

III. check whether the cpu is 32-bit or 64-bit

View CPU bits (32 or 64)

# Getconf LONG_BIT

# Echo $ HOSTTYPE

# Uname-

IV. view the current linux version

# More/etc/redhat-release
# Cat/etc/redhat-release

V. view the kernel version

# Uname-r

# Uname-

6. view the current time

Date

 

7. View hard disks and partitions

Df-h

Fdisk-l

You can also view partitions.

Du-sh

The occupied space is displayed.

Du/etc-sh

The directory size is displayed.

 

8. View installed software packages

View the software packages installed during system installation

Cat-n/root/install. log

More/root/install. log | wc-l

Check the software packages that have been installed.

Rpm-qa

Rpm-qa | wc-l

Yum list installed | wc-l

But it is strange that the number of installation packages I query through rpm and yum is not the same. No reason is found.

 

 

9. view the keyboard layout

Cat/etc/sysconfig/keyboard

Cat/etc/sysconfig/keyboard | grep KEYTABLE | cut-f2-d =

 

10. View selinux information

Sestatus

Sestatus | cut-f2-d:

Cat/etc/sysconfig/selinux

 

11. View ip address and mac address

In the ifcfg-eth0 file you can see mac, Gateway and other information.

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 }'

 

View Gateway

Cat/etc/sysconfig/network

View dns

Cat/etc/resolv. conf

 

 

 

 

 

 

 

 

12: view the default language

Echo $ LANG $ LANGUAGE

Cat/etc/sysconfig/i18n

 

Thirteen: check the time zone and whether the UTC time is used.

Cat/etc/sysconfig/clock

 

14. view the host name

Hostname

Cat/etc/sysconfig/network

Modifying the host name is to modify this file, and it is best to modify the host file as well.