Permissions have two parts: an action and a set of users. The three actions—read, write, and execute—define what can be done ...

Have you ever wanted to read a file one line at a time in a shell script and found the task to be a lot more trouble than you ever imagined? If you use a “for line ...

A common task for a program is to read data from a file. To read from a text file in C, you will need to open a file stream using the fopen() function. Once a file stream has been opened, you can then ...

I have six computers and use a Mac mini as a fileserver with sharing set up on it. About every week some of the files become read-only for some of the users. She also asks: When I open the files on ...

Linux is the most flexible and customizable operating system on the planet. That customizability starts deep within the heart of the Linux kernel and the file system. A computer file system is a ...