CentOS command for viewing various service information

CentOS command for viewing various service information
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