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When studying for a Cisco certification such as CCNA, CCNP, CCIP, or CCIE, there is nothing like having real routers and switches to play with, but it can get expensive to build a lab to study with. There is an excellent simulator that is free, but the users must supply their own Cisco IOS software. Once it is set up, the simulated routers, switches, and firewalls act as if they were real hardware. That gives the user flexibility to play with the real Cisco IOS from command prompts on the simulated hardware. What is GNS3? GNS3 is a graphical network simulator that allows you to design complex network topologies. You may run simulations or configure devices ranging from simple workstations to powerful Cisco routers. It is based on Dynamips, an IOS emulator which allows users to run IOS binary images from Cisco Systems and Pemu, a PIXOS emulator to emulate PIX firewalls. Where Can I Download GNS3? http://www.gns3.net How To Configure GNS3 This installation assumes you have a cisco rout...

This procedure assumes you have console access, and are authorized to make changes to accounts on the machine, including root. If you own the machine, you can boot into single user mode, and change the password, or create an account. If using grub (you should see a blue bootup screen), press "a", "space", "1", "enter" a 1 That will boot to single user mode. Then you can change the root password passwd Then reboot Ctrl-Alt-Del You should create user accounts other than root. Use the useradd command. useradd someone passwd someone rhce linux

Did you know, you can receive undergraduate credit for IT Certifications? I was so happy to find out about this. I had taken off a few semesters from school to work on my certs. I had completed my CNE and was working on my MCSE, when I found out I could get credit for some of the exams. The coolest part was, that I didn't really lose any time by getting my certs. I was able to combine the best courses from some very good universities for a more well-rounded education. Ways to Earn Credit Earn undergraduate credit through Excelsior College courses and Excelsior College Exams, credit earned at other regionally accredited institutions, military training, corporate training, technology certification, and more. You may be closer than you think to earning your degree! This looks like an add, but it is more of a personal endorsement. I highly recommend looking into this for any IT person who has not completed their degree yet. You have to keep up with certifications anyway, so why ...

How Do I Configure Networking in RedHat Linux? Depending on the version of RedHat, or Fedora: redhat-config-network system-config-network bash-2.05b$ which redhat-config-network /usr/bin/redhat-config-network bash-2.05b$ Network Related Files: /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network /etc/hosts /etc/resolv.conf For more details, remember that the Red Hat Manuals are available online: http://www.redhat.com/docs/manuals Network Info: http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/ref-guide/s1-networkscripts-interfaces.html rhce linux