CentOS System Command

Source: Internet
Author: User

System Command Yum command

Yum Makecache Yum Generate cache
Yum List installed mysql* see if there are any installed * packages
Rpm-qa | grep mysql* See if mysql* package is installed
Yum List mysql* See if there are any installation packages
Yum Search mysql* Find Package

Restart

Reboot-h now

For off-machine

Shutdown-h now

-H Avoid damaging MySQL

View CPU

More/proc/cpuinfo | grep "model name" #查看CPU
grep "CPU"/proc/cpuinfo #查看CPU
grep "model Name"/proc/cpuinfo | Cut-f2-d:
getconf Long_bit #CPU位数

CentOS kernel version

Uname-r
Uname-a

View process

Ps-a View All Processes
Ps-au View more information
PS F shows the process tree-like relationship

View ports

Lsof-i tcp:80 View Port
NETSTAT-NTLP List all ports

View Memory

grep memtotal/proc/meminfo
grep Memtotal/proc/meminfo | Cut-f2-d:
Free-m |grep "Mem" | awk ' {print $} '

View system resources

Vmstat 1-s m

View hard disks and partitions

Df-h
Fdisk-l

To view the packages installed on the system

Cat-n/root/install.log
More/root/install.log | Wc-l

See which packages are now installed

Rpm-qa
Rpm-qa | Wc-l
Yum list instal
View Package Installation Path

RPM-QL Package Name

Firewall

Systemctl Start Firewalld.service #启动firewall
Systemctl Stop Firewalld.service #停止firewall
Systemctl Disable Firewalld.service #禁止firewall开机启动

Service iptables status Query firewall state
Service Iptables Stop Stop
Service Iptables Start
Service Iptables Restart Restart
Chkconfig iptables off permanently closed
Chkconfig iptables on permanently closed after enable

Open port

Method One:
/sbin/iptables-i input-p tcp–dport 80-j ACCEPT Write modification
/etc/init.d/iptables Save Changes
Service iptables Restart Restart Firewall, modification takes effect

Method Two:
Vi/etc/sysconfig/iptables Open the configuration file by adding the following statement:
-A input-p tcp-m state–state new-m tcp–dport 80-j ACCEPT reboot firewall, modify complete

Close port

Method One:
/sbin/iptables-i input-p tcp–dport 80-j DROP Write modification
/etc/init.d/iptables Save Changes
Service iptables Restart Restart Firewall, modification takes effect
Method Two:
Vi/etc/sysconfig/iptables Open the configuration file by adding the following statement:
-A input-p tcp-m state–state new-m tcp–dport 80-j DROP reboot firewall, modify complete

View port Status

/etc/init.d/iptables status

View Host Name

Hostname
Cat/etc/sysconfig/network

View file contents, display line numbers

Cat-n Test.txt

Shutdown-r now reboot the system for the settings to take effect
Shutdown-h now shutdown
Reboot restart
Poweroff shut down the machine
Apache

Rpm-qa |grep httpd to see if Apache is installed in the system
Apache Start stop
Service httpd Start #启动
Service httpd Stop #关闭
Service httpd Restart #重新启动
/ETC/INIT.D/HTTPD Restart is also restarted
#/sbin/chkconfig httpd on [setting Apache server httpd service boot]
#/sbin/service httpd start [Start httpd Service, independent of boot start]

Mysql

Service mysqld Start
Service Mysqld Stop
Mysql–version #查看版本

RPM Name Command

Rpm-q PHP #是否安装PHP
Rpm-q MySQL #是否安装mysql
RPM-Q httpd #是否安装 Apache

Whereis MySQL #mysql安装位置

Set the IP temp settings:

Ifconfig eth0 192.168.1.122

Permanent settings:

Vi/etc/sysconfig/network-scripts/ifcfg-eth0

Bootproto=static
broadcast=192.168.0.255

ipaddr=12.168.0.33 #如果设置网卡获得 IP address is statically specified, this field specifies the IP address of the NIC
netmask=255.255.255.0 #网卡对应的网络掩码
network=192.168.0.0 #网卡对应的网络地址

Vi/etc/sysconfig/network

Networking=yes (Indicates whether the system uses a network and is generally set to Yes.) If set to no, the network cannot be used, and many system services programs will not start.
Hostname=centos (Set the hostname of this machine, the host name set here should correspond to the hostname set in/etc/hosts)
gateway=192.168.0.1 (Sets the IP address of the gateway for the native connection. )

Vi/etc/resolv.conf

NameServer is the DNS server IP address, the first is the preferred one, the second is the standby.

To restart the network:

Service network restart or/etc/init.d/network restart

Zip command

Zip compression:

Cd/wwwroot
Zip-r Wwwroot.zip Wwwroot
Zip Decompression:

Cd/home
Unzip Wwwroot.zip

CentOS System Commands

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