What to do if xshell fails to connect to centos
xshell连接centos失败的解决办法：1、打开虚拟机，设置子网IP；2、设置网关IP；3、修改网卡文件内容；4、通过“systemctl restart network”重启网络即可。
本文操作环境：CentOS 7系统、DELL G3电脑
xshell连接centos失败怎么办？
Xshell连接CentOS失败，记录一次CentOS7.6网络连接的步骤（笔记）
问题:本来在公司可以正常连接网络，回到学校换了学校的无线网络之后连接不上网络，Xshell连接Linux失败，CentOSping外网不通，这里记录一下解决办法(通过设置Linux静态Ip)。
打开虚拟机-编辑-虚拟网络编辑器-设置子网IP
上图打开NAT设置之后，设置网关IP(要和子网IP在一个网段)
-
修改网卡文件内容，使用vim模式打开网卡文件
打开网卡文件命令:
vi /etc/sysconfig/network-scripts/ifcfg-ens33
如果不知道网卡文件名，可以使用以下命令查看:ll /etc/sysconfig/network-scripts/ | grep ifcfg-en
打开之后修改和添加如下：
BOOTPROTO=static ONBOOT=yes IPADDR=192.168.25.73 GATEWAY=192.168.25.2 NETMASK=255.255.255.0 DNS1=114.114.114.114 DNS2=8.8.8.8
- IPADDR:为设置的IP，更改为和子网IP在同一网段的自定义IP
- GATEWAY:为虚拟网络编辑器设置的网关IP，这个要与自己的网关IP一致(注意)
- NETMASK:子网掩码
- 其它都一致即可
查看网关IP:
- 设置完成之后，保存退出，重启网络
systemctl restart network - 查看CentOS中的IP，通过
ip addr命令查看
- 打开WIndows下的命令行，输入cmd进入命令行，然后输入
ipconfig命令查看IP，确保和CentOS下的IP在同一个网段即为设置成功
设置成功之后，本机pingCentOS，CentOSping本机，CentOSping外网都可以成功！！！
推荐：《centos使用教程》
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