Localhost

Localhost is a name. That name comes back to your machine. The address is usually http://localhost, and a port stands beside it: 8080, 3000, or 5173. A port is a door number. Two programs on the same computer cannot take the same number. You check the site at this address. If a friend in another city opens this address from their phone, your page does not come. Their own computer comes. Because localhost never leaves your house. Hosting is the opposite. It is a machine that stays on day and night and has an internet address. The files move there. A domain, for example nibrascode.com, is the memorable name of that machine. DNS ties the name to the address. The name, the machine, and your test address are three separate things.

Localhost is for checking. Hosting is for showing someone else. A domain replaces the address with a name.

• Opening a page only on your own machine
• Checking a button before putting it on the internet
• Putting a finished site on a machine that stays on
• Taking a name instead of a long address

With localhost you see the page, the button, and the mistake on your own machine. Nobody opens it from another house. With hosting you put the file on that machine and open the door to the internet. You buy a domain and tie it to the hosting address in DNS. After that a person types the name and your page comes. Sending localhost to a friend does not work. 127.0.0.1 is the same door, still your machine. Putting a site on the internet is not copying localhost. The file has to move to another machine, and the name has to look there.

Opening the address is easy. The difficulty is mixing three things. If localhost works, that does not mean the site is on the internet. If a domain is bought, the file does not fly there by itself. If the hosting address changes, DNS can still look at the old place and the page does not open. If the port is busy, the program does not rise a second time. Another mistake is to leave a secret key or a half-finished error on localhost and throw the same folder onto hosting. The test place and the place people see have to be kept with the same care.

Localhost is free and hides a mistake. Someone else does not see it. That is good, and it is also not enough for sharing. Hosting opens a way for someone else, but the machine, the name, and the protection stay with you. A domain is a nice address, not the file itself. Fix it on localhost first. Then put the file on hosting. Tie the name there last.

Three words: localhost is your machine, hosting is another machine, and a domain is a name.

• localhost does not go out to the internet
• 127.0.0.1 is the same door
• A port is a number, two programs do not share one number
• A domain is not a file, it is a name

This address is only the door on your computer. If you send it to a friend, their computer opens.

http://localhost:8080
http://127.0.0.1:8080

• Is localhost visible on the internet? No. It opens only on your computer. If someone else types the same word, they open their own machine.
• Are hosting and a domain the same? No. Hosting is a machine. A domain is a name. The name is tied to the machine with DNS.
• How do I put a site on the internet? Fix it on localhost first. Then put the file on the hosting machine. Tie the domain there last.