Problem scenario
You want to use Eclipse as an IDE on Fedora. How do you install Eclipse on Fedora?
Solution
Run this command:
sudo dnf install eclipse …
Problem scenario
You are trying to terminate some EC-2 instances. But you see a message like this:
“AttributeError: ‘ec2.ServiceResource’ object has no attribute ‘terminate_instances'”
“AttributeError: ‘ec2.ServiceResource’ object has no attribute ‘destroy_instances'”
“AttributeError: ‘ec2.ServiceResource’ object has no attribute ‘delete_instances'”
What should you do?
Solution
Rewrite the terminate portion to look like this:
ec2.instances.filter(InstanceIds=[’i-0abcd1234′, ‘i-0wxyz9999’]).terminate() …
Problem scenario
You want to delete a CloudFormation Stack with Boto. What do you do?
Solution
Run a program like this (but replace “continualstack” with the name of the stack you deployed):
import boto3
cloudf = boto3.client(‘cloudformation’, region_name=’us-west-1′, aws_access_key_id=’AKIAMNOPQRST’, aws_secret_access_key=’FOOBAR1234/ZYXWV987654′)
json_stack=open(‘lampstack.json’, ‘r’).read()
cloudf.delete_stack(StackName=’continualstack’) …
Continue reading “How Do You Use Boto and CloudFormation to Delete a Stack?”
Problem scenario
You keep opening Mozilla Thunderbird in Windows, and it keeps finding the old settings. You want a fresh installation. What should you do?
Solution
Overview: Totally remove Thunderbird and reinstall it.
Procedure
- Close Thunderbird
- Install CCleaner. It can be downloaded from here: https://www.ccleaner.com/ccleaner/download. (The free version will work.)
- Open it.
…
Continue reading “How Do You Eliminate Old Email Settings in Mozilla Thunderbird on Windows?”
Problem scenario
You want to use Boto to deploy a CloudFormation stack. Where can you find an example of a Python program that deploys a CloudFormation stack?
Solution
Prerequisites
This assumes you have installed Boto. If you need assistance, see this posting.
Procedures
- Create a .json template file.
…
Continue reading “How Do You Use Boto to Deploy a CloudFormation Stack?”
Problem scenario
You are running a Python program. But you get “NameError: name ‘copy’ is not defined” or “object has no attribute ‘copy'”. What should you do?
Solution
Use “import copy” at the top of the program.
…
Problem scenario
You are running a Hadoop command, but you get this message:
java.net.ConnectException: Your endpoint configuration is wrong; For more details see: http://wiki.apache.org/hadoop/UnsetHostnameOrPort, while invoking ApplicationClientProtocolPBClientImpl.getApplicationReport over null after 3 failover attempts. Trying to failover after sleeping for 22088ms.
2020-12-20 18:54:36,679 INFO ipc.Client:
What should you do?
Possible Solution
Is Resource Manager running? Start a new terminal and run “jps” to find out.
…
Problem scenario
You want to run some curl commands to invoke a GitHub Enterprise URL. You tried using “https://api.github.foobar.com/…”, but you get a message about the URL not resolving. How can you find out what the API endpoint is?
Possible Solution
Try “https://github.foobar.com/api/v3/…” instead. Although Github.com uses the “api” immediately after the “https://” constructor (and to the left of the “github…” section),
…
Continue reading “How Do You Determine the GitHub Enterprise URL for the API Endpoint?”
Problem scenario
You want to know some CLI commands of Stack Storm. How do you find what options you have?
Solution
Run this: st2 -h
…
Continue reading “How Do You Find the man Page for Stack Storm?”
Problem scenario
Sometimes the “Read more” or “Continue reading” hyperlink in the page preview of your website (e.g., when you search for a word), is not visible. You know that some of your web page previews on your website don’t have the “Read more” hyperlink at the end. This makes the preview appear to have the entire web page. You need to identify the postings that don’t have the “Read more.” How do you use Python to find the pages that have previews that have no “Read more” hyperlink?
…