关闭防火墙
查看防火墙状态
/etc/init.d/iptables status
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/b464e5162a884111a567057ddb5f4ffb/clipboard.png)
停止
/etc/init.d/iptables stop
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/de3a818c1a494873a54cd7ff2243a462/clipboard.png)
开机不启动
chkconfig iptables off
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/c4073f3be39f48e7a641a1ca6c6f1a6f/clipboard.png)
设置selinux
临时关闭:setenforce 0
setenforce是Linux的selinux配置命令,执行setenforce 0 表示关闭selinux。
setenforce 1 开启
setenforce 0 临时关闭
永久关闭(系统启动的时候就是关闭的):
vi /etc/selinux/config
简单说,iptables管网络,selinux管本地。
SELinux不是安全性增强了的Linux内核,只是一套访问权限控制系统,类似于安卓上对软件的权限控制,比如禁止国产流氓软件读取通讯录、短信,使用GPS模块等等。
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/e08e822a63e44b20962355ce3824df1b/clipboard.png)
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/51b60669f56d40e485daf3c2ab642c98/clipboard.png)
改为disabled
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/ab4f964986914e31965ffc023d489ce5/clipboard.png)
然后以reboot命令重启操作系统。
启动网络服务
centos 安装成功后,网络服务默认不会开机启动
ipconfig ,可以看到没有 ip
vi /etc/sysconfig/network-scripts/ifcfg-eth0
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/276eebda7a154387bf14d023fe41c826/clipboard.png)
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/ac9cbed635f84369a6135146d08f3f55/clipboard.png)
改为yes
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/189cce58411f4bb091fd6986b40afdd6/clipboard.png)
ONBOOT=yes
是指明在系统启动时是否激活网卡,只有在激活状态的网卡才能去连接网络,进行网络通讯
重启网络服务
/ect/init.d/network restart
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/00c6a0b110334f84add2b2c1e5e1518a/clipboard.png)
查看获取到的IP,
ifconfig
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/19e920a60a9944788728c6ba05fcbb90/clipboard.png)
可以ping通,否则要检查NAT的设置
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/9756c96ee7e44c96ab52fe765d8844eb/clipboard.png)
服务器的IP是固定的,所以需要设置静态IP
查看及修改DNS
cat /etc/resolv.conf
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/3fbe394dac424b95ad40233977818a56/clipboard.png)
* 修改DNS
重启生效: vim /etc/resolv.conf
-- 增加下面一行
nameserver 192.168.131.2
查看及修改网关
netstat -rn
(以0.0.0.0开始的行的gateway是默认网关)
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/fc1d6ec56d9e41a8ab44cf0b9d27d85b/clipboard.png)
* 修改默认网关
即时生效 : route add default gw 192.168.131.2
重启生效: vim /etc/sysconfig/network
-- 增加或修改下面一行
GATEWAY=192.168.131.2
设置网络信息
* 修改 IP 地址
即时生效: ifconfig eth0 192.168.131.130 netmask 255.255.255.0
重启生效: vim /etc/sysconfig/network-scripts/ifcfg-eth0
-- 增加或者修改下面几行
BOOTPROTO=static
IPADDR=192.168.131.130
NETMASK=255.255.255.0
vi /etc/sysconfig/network-scripts/ifcfg-eth0
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/564ba5e7b9fd485998e4788d9bdbc947/clipboard.png)
输入a进入编辑模式
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/9fefccaf63f74c578433b4c833c421d3/clipboard.png)
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/4bb67ec8216c4ec294b378ac3942fe4a/clipboard.png)
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/5cc3290808104a0bb279ad14919d7d57/clipboard.png)
BOOTPROTO=static
IPADDR=192.168.131.130
NETMASK=255.255.255.0
GATEWAY = 192.168.131.2
DNS1= 192.168.131.2
输入 Esc 进入命令模式,输入 :wq
重启网络服务
/ect/init.d/network restart
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/caf9e475c77242918ef3e1559147f0cf/clipboard.png)
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/e5f8db65b4d14beebb0703b6450077cd/clipboard.png)
ping www.baidu.com
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/d27bce53cef14ca4b60d1e154e724b71/clipboard.png)
修改hostname
vi /etc/sysconfig/network
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/99a50797122f461b84c3f95eb2460eb4/clipboard.png)
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/4e742f768f9f44728a62b56a9f5ee5a5/clipboard.png)
改为:installoracle.example.local
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/f0523aa1f4d5410791f86c4fce61e0d2/clipboard.png)
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/2907218c26814211a68fee9032adf494/clipboard.png)
临时设置主机名:
通过hostname工具来设置主机名只是临时的,下次重启系统时,此主机名将不会存在;
显示主机IP:
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/9635e051ca484e2b944ce1c3e57b22ca/clipboard.png)
配置host
vi /etc/hosts
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/967cae1cf2ce4b38bca21930c68fb81f/clipboard.png)
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/5580710f9ca74b0f8a8059d3c0a15a33/clipboard.png)
如果ip和hostname对应错了,安装oracle配置网络监听的时候一直提示端口被占用,
![](file:///C:/Users/my/AppData/Local/YNote/data/gsc_wgy@163.com/3640a5d1110b4a4287ddbdf0a3224d4c/clipboard.png)