What are file permissions in a computer system?

What are file permissions in a computer system?

File permissions determine who can read, write, or execute a file. They are crucial for security.

How do I change file permissions in Linux?

You can change file permissions in Linux using the chmod command followed by the permission settings and the file name.

What do the numbers in chmod mean?

The numbers represent different permissions: 4 for read, 2 for write, and 1 for execute. They are summed for each user category.

Can you give me an example of using chmod?

Sure! To give the owner read and write permissions, and the group read permissions, you would use chmod 640 filename.