Problem scenario
You want to see every PowerShell 5 command available. What should you do?
Solution
This may not show every PowerShell v. 5 command, but it will show many: Get-Command
Another was is to open Windows PowerShell then go to View -Show Command Add-On. The list will be different if you are running Windows in Google Cloud Platform or AWS.
Problem scenario
You wrote a Dockerfile. You are using it to try to create a Docker image. When you run the “docker build” command you get some error messages. The errors include one or more of the following:
1) A MarkupSafe fatal error related to Python.h.
2) A C extension not being compiled.
3) An invalid syntax error related to async (e.g., Jinja2/jinja2/asyncfilters.py”).
You need to base the image off Ubuntu.
Problem scenario
You use del and pop to remove items from lists. You noticed that pop is slower than del. Why is this the case?
Solution
There are two reasons. One, pop returns the value that is removed. Two, pop acts as a function call as opposed to a primitive action. Whereas the del invokes a primitive action (a non-recursive function call),
Problem scenario
You want to use the MVC model without Microsoft technologies. You want to try out the Spring framework to leverage its inverse-of-control. How do you quickly deploy the Spring framework?
Solution
Prerequisites
i. This assumes that you have installed Git. If you need to install it, try this command:
sudo yum -y install git
ii.
Problem scenario
You recently migrated to WordPress. There are small windows of text on the left or right side of your blog. They are not posts. You do not know how to modify them. What should you do?
Solution
These sidebar text rectangles are called “Footers” in WordPress. To modify them, delete them, or create new ones do the following three steps:
Problem scenario
You have C++ installed. You want to know what version it is. What do you do?
Solution
Possible solution #1
Run this command: /usr/bin/cpp -v
Look for the word “version”. Use CTRL-c to exit out.
Possible solution #2
Run these two commands:
. /opt/intel/bin/iccvars.sh intel64
icc -v
(Taken from https://superuser.com/questions/465949/how-to-know-what-version-of-c-compiler-is-installed-on-linux-server)
Problem scenario
You want to see if the immutable flag is set on a file. What do you do?
Solution
Run this command: sudo apt -y install e2fsprogs
Problem scenario
You get “command not found” when you try to run “chattr”. What should you do?
Solution
Run this command: sudo apt -y install e2fsprogs
Question
Ping is a common diagnostic tool in networking technology. It is essentially an echo request to confirm an IP address is up and accessible. Where does the term ping come from?
Answer
The acronym for “packet inter-network groper” seems like it is a backronym for the trademarked table tennis game which involves a lightweight ball being returned in the opposite direction that it was sent.
Problem scenario
How do you find files on a Linux server that consume more than one gigabyte of space?
Solution
Run this command: sudo find / -size +1G -type f -print