DevOps vs Site Reliability Engineering I’ve been around for a really long time. It was about 5 or 6 years ago that I started hearing the term DevOps. I wasn’t sure what to make of it, but I assumed it was a systems administrator that wrote code to automate tasks. It was basically what I’ve […]
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Confession Of A C/C++ Programmer
I saw this one posted to reddit/r/programming today: http://robert.ocallahan.org/2017/07/confession-of-cc-programmer.html I’ve been programming in C and C++ for over 25 years. I have a PhD in Computer Science from a top-ranked program, and I was a Distinguished Engineer at Mozilla where for over ten years my main job was developing and reviewing C++ code. I cannot […]
Continue ReadingANSI Escape Codes
I was looking at an old version of my site and I saw a Link to ANSI Escape Codes – you never really hear about anyone using these things any more – but they are still kind of great when you are writing terminal based code (which I often do) – I should probably start […]
Continue ReadingWriting Excel worksheets using Python XlsxWriter
http://xlsxwriter.readthedocs.io/ (© Copyright 2013-2017, John McNamara) I want to just say thanks to the author John McNamara for writing this reference. When I write code I normally start with a task and goal in mind as a finished product. I don’t necessarily set out to become an expert in a particular module, but I do […]
Continue ReadingInterview with James Gosling, Father of Java
Credit: https://www.mappingthejourney.com/single-post/2017/06/29/Episode-3-Interview-with-James-Gosling-Father-of-Java – I just found this website .. these guys have some great podcasts coming up.
Continue ReadingRolling Back a YUM Update in CentOS and RHEL
rpm -qa –last | less (gets a list of dates when packages were installed) “yum history” to see a history of yum transactions use “yum history undo transaction_number to roll back the change # yum history Loaded plugins: product-id, refresh-packagekit, subscription-manager Updating Red Hat repositories. ID | Login user | Date and […]
Continue ReadingGetting started with VMwares ESXi/vSphere API in Python
I’m really glad I found this: https://www.jacobtomlinson.co.uk/vmware/2016/06/22/using-vmware-esxi-vsphere-python-api/ It made it super easy to get started with connecting and querying VMware from Python. I’ll post more on the topic as I go.
Continue ReadingParsing nmap output with Python
While seeking out servers that needed to be patched for the WannaCry Ransomware attack yesterday, I ran a nmap scan on most of my company subnets. The nmap output looks like this: Nmap scan report for prelude.nyc.domain.com (172.16.0.9) Host is up (0.00046s latency). Not shown: 993 closed ports PORT STATE SERVICE 22/tcp open ssh 111/tcp […]
Continue ReadingRHEL 7 – How-To enable EPEL packages
make sure you are correctly configured: subscription-manager list –consumed you may need to add a subscription: subscription-manager register –auto-attach –force if everything is OK: subscription-manager repos –enable rhel-7-server-extras-rpms subscription-manager repos –enable rhel-7-server-optional-rpms subscription-manager repos –enable rhel-7-server-rpms subscription-manager repos –enable rhel-ha-for-rhel-7-server-rpms
Continue ReadingRe-Writing BSD 4.4 Shell Commands: cat
A new series on youtube is attempting to “re-write” UNIX Commands like it’s 1994. I think he’s doing a great job so far. Below is the first installation. I just subscribed to his channel and can’t wait till the next installations. The author talks about parsing C command line arguments “the old school way”. I’m […]
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