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From your output, it seems that this problem has nothing to do with permissions. But for completeness' sake, try the following: `sudo` is a fairly common tool in Linux. As far as I can tell, Ubuntu has always included `sudo`, and since the GNS3 VM is based on Ubuntu, I would be very surprised if `sudo` didn't work in the GNS3 VM shell. To see how `sudo` works, try the following within the GNS3 VM: sudo ls `sudo` will ask for your password, and if you provide the `gns3` user's password, you should get the directory contents. Then try the 3 following, separate commands: LD_LIBRARY_PATH=/opt/unetlab/addons/iol/lib echo $LD_LIBRARY_PATH sudo /opt/unetlab/addons/iol/bin/x86_64_crb_linux_l2-adventerprisek9-ms.bin 1 Another thing you can try is to copy the .yaml file that you can find with the image into the same directory as the image (/opt/unetlab/addons/iol/bin/ in your case).

Can you try running the binary as root? Something like `sudo x86_64_crb_linux_l2-adventerprisek9-ms.bin` ?

Nice @jitendra! Did you have to do anything special, or did you just add the image through the GNS3 UI?

I did manage to get the IOL L2 image to run on GNS3. I run my GNS3 images directly on my Ubuntu host. I guess the way I do it must be very similar to how you would do it when using the GNS3 VM. When I first tried running the IOL L2 image, it would not run because the image was not an executable. I thus had to `chmod +x` the file. After that, I managed to add it into GNS3 as an IOL device, with no issues. But when I tried running it, GNS3 threw an error. I think the problem that GNS3 had in the beginning was actually writing the startup-config into the switch's NVRAM (or flash, whatever). GNS3 just couldn't do it and it threw an error. (I am not exactly sure but, if I remember correctly, the error was something like "GNS3 could not find nvram in the expected location"). Well, I thought, the only reason that GNS3 is looking for the nvram during bootup, to begin with, would be to put the startup-config in there. I knew it wasn't the IOL image that couldn't find its NVRAM, because it was GNS3 that was complaining, not the IOL itself. So I went to the device's settings in GNS3, and told GNS3 to not use a startup-config. To be sure that the issue had nothing to do with the VM's RAM, I also bumped RAM to 614 MB. I started the switch, and it worked. It actually boots up pretty fast too. I later tried 512 MB RAM, and that worked as well. I tried the L2 IOL because my experience that those ones are a little harder to get to run, and have not yet tested the IOL L3 image. Are you getting an error message when trying to run the L2 image in GNS3? Can you post the error here? And how much RAM did you give it?

Downloaded the two images. Installed the L2 image in GNS3 on my Ubuntu laptop. I gave it 640MB or RAM and it worked just fine. My only issue is that GNS3 cannot push a template startup-config. So you have to create the IOL device and do not define a Startup-config. To get the file to work with GNS3 on Ubuntu, I also renamed the file to give it a .bin extension. Also, you need to give the file executable permissions: $ mv x86_64_crb_linux_l2-adventerprisek9-ms x86_64_crb_linux_l2-adventerprisek9-ms.bin $ chmod +x x86_64_crb_linux_l2-adventerprisek9-ms.bin At the end, I got the following: SW1#show ver Cisco IOS Software [Dublin], Linux Software (X86_64BI_LINUX_L2-ADVENTERPRISEK9-M), Version 17.12.1, RELEASE SOFTWARE (fc5) Technical Support: [Hidden Content] Copyright (c) 1986-2023 by Cisco Systems, Inc. Compiled Thu 27-Jul-23 22:33 by mcpre Thanks a bunch @netkillui!

Does anyone have access to the TIA-568 set of standards? The most interesting (to me at least) are TIA-568.1 revision E and TIA-568.2 revision "D" TIA-568.1 Revision E, Commercial Building Telecommunications Infrastructure Standard TIA-568.2 Revision D, Balance Twisted-pair Telecommunications Cabling and Components Standard

This is the latest iteration of the best study Guide for ENCOR 350-401. I am still working on it (but I am getting more and more tired). It is a PDF with all ENCOR questions that I could find separated by topic, in chapters. I also included extensive explanations, discussions, and ripped relevant content useful for studying from web pages. I challenge anyone to find a better ENCOR study guide and post it here. I wish I didn't have to put all this effort into making this, but I just couldn't find a study guide targeted towards people who want to study the technology to the depth that the exam requires. December 2023 update: I added several new questions, expanded explanations, topic introductions, and brought back some questions that are no longer covered by the latest ENCOR topics but it appears that Cisco still keeps around for the exam. Fixed many answers and explanations too. I do have a few requests from everyone who downloads this: Please provide feedback on the content. Please let me know how you think i can upload the source code somewhere (anonymously) so people can collaborate on this guide. Please let me know about a source of questions that are not included so I can grow this guide. ENCOR.pdf

@flashgthe file you uploaded only contains 771 questions. Is there a 778 (or larger) version?

@x0dia I wrote the following for Q.20 of the HSRP chapter: The local device has a priority of 100 which is smaller than the active router (priority 255). Therefore, option A is not correct. From the line Virtual IP address is 10.1.1.1 we learn that answer B is correct. The holdtime is 10 seconds so the local router needs to wait 10 seconds before becoming the active router. Therefore, option C is not correct. The hello timer of 3 seconds and hold timer of 10 seconds are the default values. Therefore, option D is not correct. Therefore, by the process of elimination, only answer E is left (although it is not totally correct). Then i wrote a small section discussing HSRP preemption timers, and a section talking about why we do not have enough information to determine, for a fact, that option E is true.

@okovwvrv I am still going through the guide one more time. I am also going through the CertyIQ 757 questions to incorporate any topics that are not in the guide. I mean I can post it with as many changes as I have already made, but I thought it would make more sense to make more changes/corrections/additions before posting the next iteration. The way I am going through this guide is: 1. I re-read a part of it every day. 2. While reading, I note down some changes I wanna make (errata, re-wording) 3. if a question's answer or explanation doesn't make perfect sense, I research online, the answers from examtopics.com, run some labs, and try to write up a better explanation (or change the answer) 4. After going the guide once, I research other sources (such as the CertyIQ questions), and add questions that the guide is missing. 5. In the meantime I try to incorporate feedback I get (which, so far, only @x0dia has provided) Whenever I feel I've made enough changes, I post a new version here. If anyone has any better ideas as to how to do this, let me know.

@x0dia Your feedback is greatly appreciated. I have already integrated most (if not all) of your comments into the guide. Just FYI, I have added the following into the Chapter 63, Q.6 explanation: In this case, we can say the Puppet and SaltStack _support_ Agents on the managed devices, whereas Ansible does not. We are not saying that SaltStack _does not support_ the agent-based management model, but rather that Ansible does not. The alternative (of putting SaltStack into the agentless category) would mean that you would have to say that Ansible is Agent-based, which is more wrong than saying that SaltStack is Agent-based.

Thanks. I think it is Chapter 28 (BGP) , Q.18. I had already added the following explanation: The only difference between the iterations is `RIB-failure(17)`. But this is not an error. It means that we have another better route for 2.2.2.2 in our routing table so the BGP route cannot be installed into the routing table. So it may be a static route for 2.2.2.2. But I will also add your explanation, in case it makes more sense for someone down the road.

@x0diaPandoc can only do md to PDF. But I have the md source files for this guide. But to convert PDF files to text, you can use the `pdf2text` tool. It definitely runs on linux, and maybe on Windows as well.

@x0dia thank you for the feedback. I have already integrated your comments. Please, keep them coming.

12 June 2023: Link is dead