I messed up my network settings through the command line. I have a headless Ubuntu Server 16.04 without any desktop environment installed for a lighter-weight installation and connected to my local network through ethernet, and I use a Windows 10 laptop with SSH to access it, so I do not have a extra screen to use to reinstall Ubuntu. Is there any way to reset all my network settings through the command line?
What exactly happened was:
I was playing around with the command line because I wanted to access my server through SSH without typing in an IP address every time I connected, so I used
sudo hostname with all its possible arguments to change its hostname from an IP address to my name. Now, SSH, SFTP, FTP, SMB, HTTP and almost everything possible is a million times slower than usual and sometimes returns "Took too long to load".
I don't mind resetting the entire OS, but I don't have an screen/monitor to use with a bootable USB/DVD. I need a solution because my website is getting affected - It takes about 45 seconds to load a 8.2MB webpage although my internet speed is above 10MBPS.
SSH is working relatively better, so is there any command-line solution to my problem?