Network card settings (set IP address, gateway, DNS)

Convention: The first network card for the external network, the second network card for the intranet (no external network of the machine to be configured on the second network card)

Description: CentOS 6.5 is installed by default and does not automatically open the network connection!

1. Network card IP and other configuration files

Vim/etc/sysconfig/network-scripts/ifcfg-eth0 #编辑配置文件, add modify the following content

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Device=eth1 #网卡名称

Hwaddr=6c:92:bf:07:99:f9 #mac地址

Type=ethernet #网卡类型

uuid=234fd48d-7932-4d7c-b678-af8507e5b642

Onboot=yes #开启自动启用网络连接

Nm_controlled=yes #设备是否被NetworkManager管理

Bootproto=static #启用静态IP地址

Ipv6init=no #禁止IPV6

Userctl=no #是否非root用户控制eth0

ipaddr=192.168.86.3 #设置IP地址

netmask=255.255.255.0 #设置子网掩码

gateway=192.168.21.2 #设置网关

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2. Set up DNS

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1)

Vim/etc/resolv.conf

NameServer 8.8.8.8

NameServer 8.8.4.4

2)

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

dns1=8.8.8.8

dns2=8.8.4.4

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Two methods of restarting the NIC

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/etc/init.d/network restart

Service Network restart

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Other

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Service Ip6tables Stop #停止IPV6服务

Chkconfig ip6tables off #禁止IPV6开机启动

Service YUM-UPDATESD Stop #关闭系统自动更新

Chkconfig yum-updatesd off #禁止开机启动

Service Network Restart #重启网络连接

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3. Resetting the host name

Conventions:

Hostname naming specification: Business-Computer room-Master Preparation-domain name

The host name is set here: bbs.hz.m.osyunwei.com

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View Host Name

Hostname-i

1) hostname "bbs.shenxn.com"

#设置主机名为bbs. Shenxn.com this is just a temporary, reboot will revert to the original name.

2) vi/etc/sysconfig/network #编辑配置文件 Modify host Name

Hostname=bbs.shenxn.com

#修改localhost. Localdomain to Bbs.shenxn.com

Shutdown-r now #重启系统

3) vi/etc/hosts #编辑配置文件

127.0.0.1 bbs.shenxn.com

#修改localhost. Localdomain for bbs.shenxn.com In fact, the hostname in this file is provided for DNS resolution only. If you don't use DNS, you only need to modify the host name

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4. Increase the Swap partition

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You need to add 1024M of swap space after determining the memory that the server needs to use

Specific operation:

1, DD If=/dev/zero of=/tmp/swap bs=1m count=1024m #创建1024M的文件块

2, Mkswap/tmp/swap #创建swap文件

3, Swapon/tmp/swap #激活swap文件

4, Swapon-s #查看swap

5, modify the/etc/fstab file, boot automatically start

Vi/etc/fstab #在最后添加下面代码

/tmp/swap Swap swap default 0 0

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5. Introduction of network Files

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/etc/sysconfig/network-scripts/ifcfg-eth0 NIC Configuration

/etc/resolv.conf DNS Configuration

/etc/hosts Host Name

/etc/sysconfig/network machine name nic Boot

/etc/fstab boot to monut system files

/etc/inittab init-initiated system level

/ETC/INIT.D Startup scripts

/etc/exports NFS

/etc/xinit.d

/etc/profile Global Variables

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Network card settings (set IP address, gateway, DNS)