A Technical I.T./DevOps Blog
Here are some tips when using Python and dealing with lists.
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Problem scenario
One of the following apply to you.
Problem scenario #1
You try a PowerShell command but you get an error like this “The ‘Login-AzureRmAccount’ command was found in the module ‘AzureRM.profile’, but the module could not be loaded.”
OR
Problem scenario #2
You try a PowerShell command but you get an error like this:
Files\WindowsPowerShell\Modules\AzureRM.profile\5.8.2\AzureRM.Profile.psm1 cannot be
loaded because running scripts is disabled on this system.
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Continue reading “How Do You Get PowerShell to Run Scripts?”
Problem scenario
In Python your program has a two-dimensional list. It prints out like this:
[’ ‘, ‘X’, ‘ ‘, ‘ ‘, ‘ ‘]
[’ ‘, ‘X’, ‘X’, ‘ ‘, ‘ ‘]
[’ ‘, ‘X’, ‘X’, ‘X’, ‘ ‘]
[’ ‘, ‘X’, ‘X’, ‘X’, ‘X’]
You want it to print out like this:
X
XX
XXX
XXXX
Solution
Assuming that there are n rows of your matrix (aka two-dimensional array),
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Problem scenario
You try to compile a java program, but you get this error:
hello.java:1: error: class HelloWorld is public, should be declared in a file named HelloWorld.java
public class HelloWorld {
^
1 error
What is wrong?
Solution
The .java file must have a name of “HelloWorld” like the public class in the error.
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Problem scenario
SonarQube is not starting up properly. What should you do?
Possible Solution #1
For the sonar.properties file do not put “#” symbols on lines that are not completely commented out. They can cause you problems.
Possible Solution #2
You may want to click here to see more about re-installing it or troubleshooting the error.
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Continue reading “How Do You Troubleshoot SonarQube Not Starting up Properly?”
Question
You often see the initialism SLS. What does it stand for?
Answers
SLS disambiguation
1. Salt State System. SaltStack uses .sls files. “The core of the Salt State system is the SLS, or SaLt State file.” (This quote was taken from this site.)
2. Scheduler Load Simulator (as in YARN SLS). To read more about this,
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Problem scenario
With an HDMI cable you cannot get an external monitor that is connected to your Windows computer to work. In the Control Panel section for “Screen Resolution” there is a drop down menu for “Display.” This will give some descriptive identification of your monitor when the monitor is working properly. It does not show an attached monitor. What should you do if the “Display” drop down in Screen Resolution (in the Windows Control Panel) does not show your monitor and the external monitor is not working to display any output?
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Problem scenarios
One or both of the following apply:
#1 You want to automate the sending of the exact same email to multiple people. You do not want to manually type in the recipients. You have the same subject and body that each recipient should receive. You want to customize the “from address” that the recipients see. How do you do this?
OR
#2 You are using the mail command on a Linux server.
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Problem scenario
You have a web page that you access from the front-end (e.g., a web browser). You want to see if there is a hyperlink on the page that goes to a certain URL. You know the web page and the URL, but you are not sure if a hyperlink on the website has such a link. What should you do?
Solution
Use the curl command.
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Continue reading “How Do You Programmatically Search Hyperlinks on a Given Webpage?”
Problem scenario
You are running a manifest and you get this error:
Error: Failed to apply catalog: Parameter mode failed on File[/opt/hadoop/hadoop-2.2.0.tar.gz]: The file mode specification must be a string, not ‘Integer’ at /etc/puppetlabs/code/environments/production/modules/hadoop/manifests/init.pp:55
What is wrong?
Solution
Go to the Puppet Master server and open the file in the error. (The error provides the full directory path.) Go to the line number that the error message specifies.
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