Getting to grips with Linux Permissions
DO IT WITH PERMISSION
From the vault:This article first appeared in issue #1 (October 2000). You'll also find this article on our 10-year anniversary Archive DVD included in issue #120 (November 2010).
With any operating system it is important to ensure that users remain in control of their files and directories and are prevented from tampering with those belonging to other users, or the system. This is what the Linux permissions system is all about, as Jono Bacon explains.
The 10-year anniversary issue hits newsstands starting:
Europe: October 4
North America: October 29
Australia: November 29
[flickr image courtesy of jessica.diamond]
Permissions are at the heart of how Linux works. Some operating systems (such as MS-DOS and some variants of Microsoft Windows) treat all files in the same way. This means that any user can change any file. Usually, there is only one kind of user.
Version 16 of the popular Linux desktop reveals new tools, edge-snapping, and performance improvements.
Symantec says Linux-Darlioz burrows in through PHP.
Dell renews its quest for the ultimate developer machine.
Innovative back door looks like normal SSH traffic.
One of CeBITs most successful forums opens the new year with a new name. The popular Open Source Forum continues in 2014 under the name Special Conference: Open Source. This year, the forum will be bigger and offer a wider range of possibilities for sponsors.
New release offers better graphics drivers and expands filesystem support.
New mail protocol will shut out the NSA and prevent snooping on metadata.
A new web application helps users visualize distributed denial-of-service attacks.
Ubuntu 13.10 takes a step toward convergence, with lots of mobility, but Mir only partly here.
Galileo board is targeted to embedded developers and educational institutions.