CentOS command for viewing various service information

The following uses Centos as an example to share various information viewing methods with users. This tutorial uses Centos, Debian, and other Linux releases to view the server CPU model.

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

View server memory capacity

Grep MemTotal/proc/meminfo

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

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

Check whether the server's CPU is 32-bit or 64-bit

Getconf LONG_BIT

View the current Linux version

More/etc/redhat-release cat/etc/redhat-release

View Linux kernel version

Uname-r

Uname-

View current server time

Date

View server hard disks and partitions

Df-h

Fdisk-l

View directory size

Du/etc-sh

View the software packages initially installed on the server

Cat-n/root/install. log

More/root/install. log | wc-l

View installed software packages

Rpm-qa

Rpm-qa | wc-l

Yum list installed | wc-l

View Server keyboard layout

Cat/etc/sysconfig/keyboard

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

View Selinux status

Sestatus

Sestatus | cut-f2-d:

Cat/etc/sysconfig/selinux

View the ip address and Mac address of the server NIC

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 default server gateways

Cat/etc/sysconfig/network

View the default DNS of the server

Cat/etc/resolv. conf

View default server language

Echo $ LANG $ LANGUAGE

Cat/etc/sysconfig/i18n

View the time zone and UTC time of the server

Cat/etc/sysconfig/clock

View server host names

Hostname

Cat/etc/sysconfig/network