So recently I’ve encountered the error in the subject. This came after 2 major changes (OS upgrade and PHP upgrade). So definitely it had to do with one of them. My money were on the first one. I’ve looked around on the internet and the only thing I could see was this old article that had no solution: https://www.digitalocean.com/community/questions/do-agent-exited-with-a-return-code-100 So I knew I had to take the matters in my own hands. I’ve started by looking at that cron entry that was failing. run-parts: /etc/cron.daily/do-agent exited with return code 100 ...

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Recently I had this issue that ate a big part of my day. Here’s how I fixed it. Firstly, some background info I’m using a Win 10 (Version 10.0.14393) OS with Office 2013 [15.0.4569.1503]. The previous day I’ve been prompted to restart my laptop to complete the new updates. I’ve left in a hurry and just closed the lid. The laptop didn’t close and I had to use the power button to stop it. I knew I was in trouble at this point, but had to attend a meeting and didn’t have time to wait for the updates. ...

I’ve stumbled upon this great list of materials you can use to get started on IT, and Networking in particular. I have to admit that some are new for me, even after being in this field for over 12 years. 2018-01-03 note, I’ve update the list with more resources /r/ITCareerQuestions Wiki /r/CSCareerQuestions Wiki /r/Sysadmin Wiki /r/Networking Wiki /r/NetSec Wiki /r/NetSecStudents Wiki Certifications IT Certification Road Map Cisco Training & certification Info Center Juniper Networks Certification Programs Microsoft Learning Info Center Red Hat Certification Info Center VMware Certification Info Center Microsoft Microsoft Learning Portal - Powered by EdX Microsoft Virtual Academy Microsoft MSDN Product Evaluation Center – Free Downloads Microsoft TechNet Product Evaluation Center – More Free Downloads Microsoft Azure Cloud Services Free Trial Center Microsoft Training Info Center Microsoft Ignite Training Convention Video Center Microsoft MSDN Video Training Portal Cisco / Networking Stanford University Free Intro to Networking Online Course Cisco Learning Center - How to Study for CCNA for Free Professor Messer’s CompTIA Network+ Training Videos Cybrary Free CCNA Training Videos Cisco VIRL - Virtual Router & Firewall Training Tool GNS3 Vault - Free Practice & Training Labs for Cisco Equipment Cisco Live Training Convention Video Portal - Free Registration Required Cisco Design Zone - Best Practices PacketBomb - WireShark Training Center NetCraftsmen - Network Consultants Blog PacketPushers News & Podcasts IOSHints - Ivan Pepelnjak’s Blog/site Cumulus Networks SDN Technical Videos SDX Central - SDN Resources Information/Computer/Network Security SANS Reading Room SANS Certifications BlackHat Conferences @ YouTube DEFCON Conferences @ YouTube RSA Conference @ YouTube Carnegie Mellon SoftEng Institute @ YouTube CMU’s Plaid Parliament of Pwning Competitive Hacking Team Blog Cybrary - Open Source Security Learning Krebs on Security blog Google’s Security Blog US CERT - Computer Emergency Response Team blog ISC^2 - CISSP - Certified Information Systems Security Professional Linux Resources Linux Foundation - Intro to Linux for Free Linux Foundation - Online Course Catalog - some free some paid DigitalOcean Linux Tutorials Docker Self-Paced Training USENIX Site Reliability Enginering Convention 2014 Presentations - Free USENIX Site Reliability Enginering Convention 2015 Presentations - Free USENIX Large Installation System Administration Conference 2014 Presentations - Free USENIX Large Installation System Administration Conference 2015 Presentations - Free PuppetConf Convention Videos 2014 - Free Registration Required PuppetConf Convention Videos 2015 - Free Registration Required ChefConf Convention Videos 2015 Ansible Video Resources - Including AnsibleFest Convention Videos SaltStack Video Resources VMware Resources VMWorld Convention Session Playback VMWare Hands-On-Labs Training Labs The Best of Cisco Live ^(Cisco Live is Cisco’s annual Technology expo & training convention.) ^(All of these presentations are available for free here: http://www.ciscolive.com/online - Many with video presentations of the lectures.) BRKARC-3001 - Cisco Integrated Services Router G2 - Architectural Overview and Use Cases (2013) BRKARC-3001 - Cisco Integrated Services Router - Architectural Overview and Use Cases (2016) BRKARC-2001 - Cisco ASR1000 Series Routers: System & Solution Architectures (2016) BRKCRS-3147 - Advanced Troubleshooting of the ASR1K and ISR (IOS-XE) made easy (2016) BRKARC-1009 - Cisco Catalyst 2960-X Series Switching Architecture (2016) BRKARC-3438 - Cisco Catalyst 3850 and 3650 Series Switching Architecture (2016 BRKCRS-3146 - Troubleshooting Cisco Catalyst 3650 / 3850 Series Switches (2016) BRKARC-3445 - Cisco Catalyst 4500E Switch Architecture (2016) BRKCRS-3142 - Troubleshooting Cisco Catalyst 4500 Series Switches (2015) BRKARC-3465 - Cisco Catalyst 6800 Switch Architectures (2016) BRKCRS-3143 - Troubleshooting Cisco Catalyst 6500 / 6800 Series Switches (2015) BRKARC-2222 - Cisco Nexus 9000 Architecture (2015) BRKDCT-3101 - Nexus 9000 (Standalone) Architecture Brief and Troubleshooting (2016) BRKCRS-1500 - Wired LAN Deployment Using the Cisco Validated Design for Campus (2016) BRKCRS-2031 - Enterprise Campus Design: Multilayer Architectures and Design Principles (2016) BRKCRS-2501 - Campus QoS Design-Simplified (2016) Cisco Design Zone: Cisco Validated Designs for Campus Networks Cisco Design Zone: Cisco Validated Designs for Branch Office Networks BRKDCT-2218 - Data Center Design for the Midsize Enterprise (2016) BRKSAN-2449 - Storage Area Network Extension Design and Operation (2015) BRKSAN-2883 - Advanced Storage Area Network Design (2016) Enjoy it! :) ...

Here’s another cool and helpful thing I just discovered that might help you stranger of the internet. Recently I joined a class on Udemy.com, and because I have other tasks at the moment and can’t dedicate 100% to it, I wanted to download the videos so I started looking for ways how to do it. The official answer is that they don’t have anything against it, but it depends on the instructors. In my case the option to download the video was not present, plus that I wanted to automate the process and not download the videos one by one. ...