How Do I Give Permission as Read Only in Linux?

What is the meaning of chmod 777?

Setting 777 permissions to a file or directory means that it will be readable, writable and executable by all users and may pose a huge security risk. … File ownership can be changed using the chown command and permissions with the chmod command.

How do I change a read only file in Linux?

Long Answer

1. Log in as the root user: [email protected]:~$ sudo su –
2. Open hostname: [email protected]:~# vi /etc/hostname.
3. You will see oldName . …
4. Open hosts: [email protected]:~# vi /etc/hosts. …
5. Similarly to what you did in step 3, change the computer name from oldName to newName . …
6. Exit the root user: [email protected]:~# exit.