read a file, write to a file, or view a file on a Web page. Files uploaded to your Unix account are automatically owned by you. Unless you give permission for other group members to edit or change a file, they cannot make modifications.

How do permissions work on Linux?

In the world of Linux, permissions are broken down into three categories: read, write and execute. “Read” access allows one to view a file’s contents, “write” access allows one to modify a file’s contents, and “execute” allows one to run a set of instructions, like a script or a program.

How do you read permissions in Unix?

To view the permissions for all files in a directory, use the ls command with the -la options. Add other options as desired; for help, see List the files in a directory in Unix. In the output example above, the first character in each line indicates whether the listed object is a file or a directory.