Today, I will show you how to connect CentOS 7 to the Internet in Virtual Machine, and if you have challenges on how to install your first CentOS 7 server in Virtual Machine, you may check the article below:
Install a CentOS 7 Minimal Server in Virtual Machine with screenshots
If you are ready, let us get started. Turn on your Virtual Machine, then login as root.
From here, go to the directory as shown below:
Let us backup our ifcfg-enp0s3 file first, by running:
cp ifcfg-enp0s3 ifcfg-enp0s3_backup
If you wish to see your back up file, run:
ls -lah | less
This should list files on our current directory as shown below:
Now, we have our back up file, let us edit ifcfg-enp0s3 by:
Then update the these lines below:
Then add this line below:
IPADDR represents your desired IP for your Virtual Machine.
Press ctr + c, the type :wq to save these changes.
Now, let us setup our gateway by going to sysconfig directory. To do so, run:
Then, let us make a backup copy of our network file, by:
cp network network_backup
If you wish to see your backup file, run:
ls -lah | grep net
You should have these output below:
Let us now add lines to network work file by:
You should have an empty file. Let us add these lines below:
NETWORKING=yes HOSTNAME=centos7 GATEWAY=192.168.2.1
You should have this output below:
Make sure to press ctr + c, the type :wq to save your changes.
If you have challenges where to get your Default Gateway, you may open your cmd on your Windows host machine, then type:
Look for Default Gateway under your network adapter. In my case, I was using my Wireless Adapter. You should have these output below:
All set? Let us work with our name servers in resolv.conf file found in etc directory. To go about this, run:
From here, make a backup copy of your resolv.conf file first, by:
cp resolv.conf resolv.conf_backup
You can view these changes by:
ls -lah | grep res
At this point, we should be able to add lines on our
This should let us edit our file using vi. For starters, vi is a Command Line Editor. If you wish to know more about vi, Ryan Chadwick made a simple explanation of how it works, see his work here
From here, add these links below:
nameserver 22.214.171.124 nameserver 126.96.36.199
These are Google Public DNS, and we will use them as our DNS resolver.
Make sure to press ctr + c, the type :wq to save these changes.
We are almost done. Make sure to restart our network changes by running:
systemctl restart network
Once completed, run :
You should see your IP address as shown below:
One way to test if you have internet connection is to ping a site. In our case, I will ping google.com
Press ctrl + c to stop the command. At this point you should have a working CentOS 7 with internet connection.