Shulou(Shulou.com)06/01 Report--

In this issue, the editor will bring you what the commands commonly used in CentOS are. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

One: check cpu

More / proc/cpuinfo | grep "model name"

Grep "model name" / proc/cpuinfo

If you feel the need to see more comfortable

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

Two: check the memory

Grep MemTotal / proc/meminfo

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

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

Three: check whether the cpu is 32-bit or 64-bit

View CPU digits (32 or 64)

Getconf LONG_BIT

Four: check the current version of linux

More / etc/redhat-release

Cat / etc/redhat-release

Five: check the kernel version

Uname-r

Uname-a

Six: view the current time

Date

It has already introduced how to synchronize time.

Seven: view hard drives and partitions

Df-h

Fdisk-l

You can also view partitions

Du-sh

You can see all the space occupied.

Du / etc-sh

You can see the size of this directory

Eight: check the installed software packages

Check the software packages installed when the system is installed

Cat-n / root/install.log

More / root/install.log | wc-l

Check which packages have been installed now

Rpm-qa

Rpm-qa | wc-l

Yum list installed | wc-l

Strangely, however, the number of installation packages I have queried through rpm and yum is not the same. I can't find the reason.

Nine: view the keyboard layout

Cat / etc/sysconfig/keyboard

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

Ten: check the selinux situation

Sestatus

Sestatus | cut-f2-d:

Cat / etc/sysconfig/selinux

Eleven: check the ip,mac address

You can see mac, gateway and other information in the ifcfg-eth0 file.

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' 127.0.1'| cut-d:-f2 | awk'{print $1}'

View Gateway

Cat / etc/sysconfig/network

View dns

Cat / etc/resolv.conf

Twelve: view the default language

Echo $LANG $LANGUAGE

Cat / etc/sysconfig/i18n

Thirteen: check the time zone and whether to use UTC time

Cat / etc/sysconfig/clock

Fourteen: view hostname

Hostname cat / etc/sysconfig/network modifies the hostname to modify the file, and * * also modifies the host file. # du-sh # View the size of the specified directory # uptime # View system running time, number of users, Load # cat / proc/loadavg # View system load # iptables-L # View Firewall Settings # route-n # View routing Table # netstat-lntp # View all listening Ports # netstat-antp # View all established connections # netstat-s # View Network Statistics # w # View active user # id # View specified user Information # Last # View user login log # cut-d:-F1 / etc/passwd # View all users of the system # cut-d:-F1 / etc/group # View all groups of the system # crontab-l # View the current user's scheduled tasks # chkconfig-list # list all the system services listed above are the common CentOS commands shared by the editor If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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