The only thing missing from ifconfig are the gateway and DNS servers.
15.04 and newer
To get the DNS and Gateway info just type:
nmcli dev show eth0
The output lists some device parameters including some
IP4.DNS[x] entries, which show the DNS servers and a
IP4.ADDRESS line which lists the IP and Gateway used (look for the
gw = ???.???.???.??? part at the end of the line up to 15.10). On 16.04 and newer versions there is a
IP4.GATEWAY line which is pretty self explanatory.
eth0 with the actual device name you're using, which may not be the same. To get a list of devices and their status type:
nmcli dev status
Up to and including 14.10
You can get these with nm-tool (in Ubuntu versions prior to 15.04) which BTW is the command line version of network manager.
To run it just type in a terminal:
If you're using Ubuntu 15.04 or newer the
nm-tool has been replaced by the
nmcli command which is different. Check the section called "15.04 and newer" above this one in this case.