Paranoid Penguin - Linux Filesystem Security, Part II
Save and exit the file.
Now, to do his thing, crash enters the command:
sudo rm /home/biff/extreme_casseroles/pineapple_mushroom_surprise.txt
whereupon he is prompted to enter his password. After he enters this correctly, the command:
is executed as root, and the offending file is gone.
Alternately, the line in /etc/sudoers could look like this:
crash localhost=/bin/rm /home/biff/extreme_casseroles/*
That way, crash can delete anything in extreme_casseroles/, regardless of the sticky bit setting.
As handy as it is, sudo is a powerful tool, so use it wisely; root privileges never should be trifled with. It really is better to use user and group permissions judiciously than to hand out root privileges, even with sudo. Better still, use an RBAC-based system such as SELinux if the stakes are high enough.
That's it for now. I hope you've found this tutorial useful. Until next time, be safe!
Mick Bauer, CISSP, is Linux Journal's security editor and an IS security consultant in Minneapolis, Minnesota. He's the author of Building Secure Servers With Linux (O'Reilly & Associates, 2002).
Getting Started with DevOps - Including New Data on IT Performance from Puppet Labs 2015 State of DevOps Report
August 27, 2015
12:00 PM CDT
DevOps represents a profound change from the way most IT departments have traditionally worked: from siloed teams and high-anxiety releases to everyone collaborating on uneventful and more frequent releases of higher-quality code. It doesn't matter how large or small an organization is, or even whether it's historically slow moving or risk averse — there are ways to adopt DevOps sanely, and get measurable results in just weeks.
Free to Linux Journal readers.Register Now!
- Django Models and Migrations
- Hacking a Safe with Bash
- Secure Server Deployments in Hostile Territory, Part II
- The Controversy Behind Canonical's Intellectual Property Policy
- Home Automation with Raspberry Pi
- Huge Package Overhaul for Debian and Ubuntu
- Shashlik - a Tasty New Android Simulator
- KDE Reveals Plasma Mobile
- Embed Linux in Monitoring and Control Systems
- diff -u: What's New in Kernel Development