How to modify Linux file read-only

How to modify read-only files in Linux?

First we open the UBUNTU operating system.

Recommended: "linux tutorial"

Find the terminal window in the menu bar and click to enter.

We create a new file as an example and set it as a read-only file.

If you open a read-only file, read-only will be displayed.

chmod 666 test.txt. At this time, execute the command. The test file is test.txt. 666 means to change it to a readable and writable file.

No prompt will be displayed when opening the file at this time. Belongs to normal mode.

chmod 222 test.txt is a file that is made writable but unreadable.

#When you open the file at this time, you will be reminded that it cannot be opened because it is not readable.

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