What are the options for the chmod command?

What are the options for the chmod command?

The chmod command is used to change the file permissions in Unix and Linux systems. It has several options, such as 'u' for user, 'g' for group, and 'o' for others. You can also use numeric modes like 755 or 644.

Can you explain what the numeric modes mean?

Sure! Numeric modes are a three-digit octal number. Each digit represents permissions for user, group, and others. For example, 7 means read, write, and execute (4+2+1), while 6 means read and write (4+2).

How do I use chmod to give execute permission to a file?

You can use the command chmod +x filename to add execute permission for all users. Replace 'filename' with your actual file name.

What if I want to remove permissions instead?

To remove permissions, you can use the '-' sign. For example, chmod -x filename will remove execute permission from the file.