An easy way to check whether you have internet access on your Linux machine is by trying to reach any remote host (server) on the internet. This can be done by using the ping command. In general, the syntax of the ping command is as follows:
ping [options] host
For example, to test whether you can reach google.com, you can run the following command:
root@ubuntu-linux:~# ping google.com
PING google.com (172.217.1.14) 56(84) bytes of data.
64 bytes from iad23s25-in-f14.1e100.net (172.217.1.14): icmp_seq=1 ttl=55 time=38.7 ms
64 bytes from iad23s25-in-f14.1e100.net (172.217.1.14): icmp_seq=2 ttl=55 time=38.7 ms
64 bytes from iad23s25-in-f14.1e100.net (172.217.1.14): icmp_seq=3 ttl=55 time=40.4 ms
64 bytes from iad23s25-in-f14.1e100.net (172.217.1.14): icmp_seq=4 ttl=55 time=36.6 ms
64 bytes from iad23s25-in-f14.1e100.net (172.217.1.14): icmp_seq=5 ttl=55 time=40.8 ms
64 bytes from iad23s25-in-f14.1e100.net (172.217.1.14): icmp_seq=6 ttl=55 time=38.6 ms
64 bytes...
