A Technical I.T./DevOps Blog
Problem scenario
You have read about heaps in computer programming and in operating systems. What do the different definitions of “heap” mean in I.T.?
Overview
Merriam-Webster’s Dictionary (11th Edition, on page 574) defines a heap as “a collection of things thrown one on another” or as a “pile.” The same word can have completely different meanings in English; a trash heap,
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Continue reading “What Is The Disambiguation of The Word “heap” in I.T.?”
1. Which is one of the five pillars of a well-architected AWS framework?
a. Archived versions (of IaC)
b. Disaster Recovery
c. Monitoring
d. Performance Efficiency
e. None of the above
2. Signature version 4 is which of the following?
a. A certificate file from Amazon Web Security.
b. An SSL public key for AWS.
c. An SSL private key for AWS.
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1. Which is one of the five pillars of a well-architected AWS framework?
a. Archived versions (of IaC)
b. Disaster Recovery
c. Monitoring
d. Performance Efficiency
e. None of the above
Answer: D. Source: https://aws.amazon.com/blogs/apn/the-5-pillars-of-the-aws-well-architected-framework/
2. Signature version 4 is which of the following?
a. A certificate file from Amazon Web Security.
b. An SSL public key for AWS.
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Problem scenario
You have two hard drives in your laptop. You want to be able to boot to one or the other. The BIOS options are confusing. What do you do?
Possible Solution (directions primarily for HP laptops)
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Continue reading “How Do You Boot to One of Two Hard Drives?”
Problem scenario
You are trying to get user data to create a file on a server in Terraform. It is in a directory that requires sudo privileges. You use the “sudo” command in the Bash script. The Bash script executes except a file is never transferred. How do you get Terraform to copy a file to a new server?
Solution
Use the Terraform-supported cloud_config option instead of having a Bash script transfer the file.
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Continue reading “How Do You Create a File on a Server with Terraform?”
With cryptocurrency prices much lower than they have been (as of 5/23/21), you may want to buy cryptocurrency. To hold your coins securely, you may want to purchase a wallet. If you are new to cryptocurrency and need to decide which cryptocurrencies to purchase, we recommend you read on the subject.
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Problem scenario
You need a pattern matching function in a Python program, but you cannot use “import re”. What should you do?
Possible Solution #1
Use the index() function.
Here is an example:
foobar = “abcdefghijklmnopqrstuvwxyz”
print(foobar.index(‘jk’))
Possible Solution #2
Use the .starswith() function.
foobar = “abcdefghijklmnopqrstuvwxyz”
print(foobar.startswith(‘abc’))
Possible Solution #3
Use the find() function.
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Continue reading “How Do You Do a regex Operation in Python without Importing a Module?”
CI is not always automated. “CI acts as a safety net that lets developers prevent many issues before they reach users. As a result, developers ship code with more confidence, but not necessarily faster — the deployment process may still be manual, long, and error-prone.” This quote was taken from this website.
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Problem scenario
You are trying to find the SSH logs in Fedora. Where should you look?
Possible solution #1
/var/log/secure/
Possible solution #2
Check these locations:
/var/log/ssh/
/var/log/auth.log
Possible solution #3
/var/log/messages
(Many other applications write to this file besides SSH.)
Possible solution #4
They could be stored in binary format in /var/log/journal/ …
Run this command: journalctl -u sshd
Look at the output.
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