A Technical I.T./DevOps Blog
Problem scenario
You bought new weightlifting shoes. They seem to tight. They are not comfortable. What should you do?
Possible Solution #1
If only one shoe feels too tight, can you see if the tongue is double-up or folded on one side? By flattening it or unravelling it, that may help.
Possible Solution #2
Can you make the velcro strap connect without as much force and tightness?
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Continue reading “What Can You Do when Your Weightlifting Shoes Are Too Tight?”
Problem scenario
A head lamp bulb needs to be replaced on a car. How difficult is it?
Answer
It is usually fairly easy and does not require tools. Changing blinkers (turn signal bulbs) and headlights is often straight-forward. The bulbs for headlights are smaller than you would think; normally they are much smaller than a typical household lightbulb.
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Continue reading “How Difficult Is It to Change a Headlight Bulb?”
Problem scenario
You have a VIVO sit-stand desk. It says “Er3” on the display. How do you fix this?
Solution
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Continue reading “What Do You Do when Your VIVO Desk Shows “Er3”?”
Problem scenario
You want to remove a car stereo. Can something go wrong if so what should you look out for?
Solution
Yes. The airbags could be triggered. The car alarm could go off. Some anti-theft devices sound an alarm if the car stereo is tampered with.
You do not want the airbags to potentially inflate suddenly causing injury to you.
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Continue reading “What Can Go Wrong if You Try to Remove a Car Stereo?”
Problem scenario
From a PowerShell prompt, you run a “bcdboot” command, but you see the message “Failure when attempting to copy boot files”.
Solution
1. Open PowerShell as an Administrator
2. Run the command again.
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It is 15 questions and the answers are available. Click here for the Security Quiz.
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Continue reading “Announcement: Security Quiz Published Today”
Problem scenario
You want to run some firewall-cmd commands. You see the flag –remove-port. Will it allow or block the given TCP/UDP port?
Answer
It will block connectivity on the port.
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Continue reading “Does Removing a Port with firewall-cmd Allow or Block Connectivity?”
Question
Given the obsolescence of information technology topics, should you hold on to study guides and books for years later as an investment?
Answer
Possibly. Sometimes one book that was published in 2010 can list for over $1,000. This book is RHCSA/RHCE Red Hat Linux Certification Study Guide (Exams EX200 & EX300) 6th (sixth) edition Text Only Paperback by Michael Jang.
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Continue reading “Should You Save Old I.T. Certification Study Guides?”
Problem scenario
You want to run some firewall-cmd commands. You see the flag –add-port. Will it allow or block the given TCP/UDP port?
Answer
It will allow connectivity on the port.
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Continue reading “With firewall-cmd Does Adding a Port Allow or Block Connectivity?”
Problem scenario
You want to retrieve lines from a log file with the word “failed”. How do you do this with Python?
Solution
Assuming the log file is named “auth.log”, this will work:
log_reader = open(‘auth.log’, ‘r’)
for line in log_reader:
lower_line = line.lower()
if lower_line.find(“failed”) != -1:
print(line) …