Best of Tech Support
I received Linux from my computer class. I use Partition Magic, but I forgot the logon name I used during the class. How do I get back in?
—Santos Gonzales, firstname.lastname@example.org
Assuming you boot with LILO, you can use some trickery to get in. When it boots, type the name of your boot image (you may press tab to get a list of images in case you forgot those) and append the string init=/bin/bash. For example, LILO: linux init=/bin/bash. Now edit the file /etc/shadow and change the line containing the word root. You want to remove all the characters between the first and second colons. Save the file. Then press Ctrl-Alt-Del to reboot. Log in as root (no password) and immediately set a password with the passwd command.
—Ben Ford, email@example.com
I recently finished installing Red Hat 7.2, and I have a separate Windows 98 PC connected to a Cox@home cable modem. I want to move the connection to the Linux box and use it as a router, firewall and, if possible, a DHCP server. The reason for the DHCP is because I want to learn how to set it up, and make it work. If you could give me the first step, or the steps in order of their priority, I would greatly appreciate it.
—Mike Dickson, firstname.lastname@example.org
First, set up your firewall. You need to set up both router protection rules and IP masquerading rules (for your Windows 98 boxes). You might want to use a GUI-based tool to start out, but you will grow out of it. Red Hat's GUI is called firewall-config. Second, set up the DHCP server. There is a DHCP mini-HOWTO at www.tldp.org/HOWTO/mini/DHCP/index.html. That's about it for a router. You can do other cool things, such as setting up your own mail server and web server, but this is a good first challenge. Overall, this project seems to be something you WANT to do, as a challenge. If this is not the case, I would recommend highly LRP out of the box or a Linksys box.
—Christopher Wingert, email@example.com
One Click, Universal Protection: Implementing Centralized Security Policies on Linux Systems
Join editor Bill Childers and Bit9's Paul Riegle on April 27 at 12pm Central to learn how to keep your Linux systems secure.
Free to Linux Journal readers.Register Now!
- New Products
- Security Hardening with Ansible
- diff -u: What's New in Kernel Development
- NSA: Linux Journal is an "extremist forum" and its readers get flagged for extra surveillance
- Monitoring Android Traffic with Wireshark
- [<Megashare>] Watch Mrs Brown's Boys Movie Online Full Movie HD 2014
- Tech Tip: Really Simple HTTP Server with Python
- New Products
- RSS Feeds
- ~Putlocker~2014 Watch Boyhood Online Streaming Full Movie