One of the golden rule of programming is :
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This is a growing list of Linux commands which might come handy for the of Linux users. 1. Found out i had to set the date like this: ...
Thursday, January 4, 2024
Sunday, September 10, 2023
Sony WH-1000XM4 Headphones ಸೋನಿ WH-1000XM4: ಸೌಂಡ್ ಮೇಷ್ಟ್ರುಗಳ ಆತ್ಮಶಾಂತಿ
Sunday, July 30, 2023
how to setup password for an AWS EC2 running instance
The AWS EC2 Linux instance uses a .pem private key file to authenticate the default ubuntu user account.
Let us learn about how to set up a password on your running EC2 instance,
Prerequisites
- You have ec2 instance running
- You have root access to ec2 instance
Step 1
Connect to your Linux ec2 instance via putty (/ssh).
Step 2
Login to your running instance
Step 3
Execute below command:
sudo passwd ec2-user
And write the password
Step 4
Now it’s time to go to the directory
/etc/ssh
and follow below command
sudo vim sshd_config
Step 5
After you apply the command,
Press “i” and
Now go to the “passwordauthentication” and write “yes”
After change, it please save it
Perfect
Step 6
Last command is
sudo service sshd restart
Friday, April 28, 2023
How to debug Python code in VS Code with arguments passed from command line
Debugging Python code in VS Code with arguments passed from the command line is a straightforward process. Here are the steps you can follow:
1. Open the Python file that you want to debug in VS Code.
2. Set breakpoints in the code where you want to pause and inspect variables.
3. Open the Debug panel in VS Code by clicking on the Debug icon in the Activity Bar or by pressing `Ctrl+Shift+D` on Windows or `Cmd+Shift+D` on Mac.
4. Click on the "create a launch.json file" button and select "Python" as the environment.
5. In the launch.json file that opens, modify the "args" attribute to include the command-line arguments you want to pass to the Python script. For example:
```
"args": ["arg1", "arg2"]
```
Replace "arg1" and "arg2" with the actual arguments you want to pass.
NOTE: Add the below property in the launch.json file.
"purpose": ["debug-in-terminal"]
6. Save the launch.json file.
7. Start the debugging process by clicking on the "Start Debugging" button in the Debug panel or by pressing `F5`.
8. The code execution will pause at the first breakpoint. Use the Debug Console to inspect variables, and use the Debug toolbar to step through the code and continue the execution.
That's it! You can now debug your Python code with arguments passed from the command line in VS Code.
Thursday, March 30, 2023
Regular Expressions
Regular Expressions
List of meta characters:
. ---> Any one character
? ---> Zero or one
+ ---> One or more
* ---> zero or more
^ ---> at the beginning of the string
$ ---> at the end of the string
[abc] ---> any one of a b c
{m} ---> 'm' times
{m,n} ---> at least m times, at most n times
| ---> or
\ ---> escape sequence character
\s ---> a space
\d ---> a digit
\w ---> a word
\b ---> a word boundary
\d ---> a single digit number (0 to 9)
\d\d ---> a two digit number (0 to 99)
\d\d\d ---> a three digit number (000 to 999)
NOTE: ?, +, *, {} are used as Quantifiers (to represent quantity)
\d{3,5} ---> either 3 digit or 5 digit number
hell?o ---> helo | hello
hell+o ---> hello | helllo | helllllo | ...
hrll*o ---> helo | hello | helllo | helllllo | ...
he(ll)+o ---> hello | hellllo | hellllllo | ...
S = "hi hello how are hello"
hello ---> Yes
^hello ---> No
hello$ ---> Yes
\d+ ---> a number
[0123456789]+ ---> a number
[0-9]+ ---> a number
\d{3} ---> a 4 digit ODD number
\d+\s\w+ ---> a number then a space then a word
\d+\s[a-z]+ ---> a number then a space then lowercase word
\d+\s[A-K764]{5,10} ---> a number then a space then min 5 max 10 char uppercase word between A - K 764
\d{3}:\d{2}:\d{4} --->
(ABC)?\d{3}:\d{4}[XYZ]? --->
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💡 Don’t code today what you can’t debug tomorrow.
Below some advices to improve yourself every day :
👉Master Your Tools: Become proficient in the programming languages, frameworks, and tools relevant to your field.
👉Problem-Solving Skills: Develop strong problem-solving skills to efficiently tackle coding challenges.
👉Debugging Proficiency: Sharpen your debugging skills to identify and fix issues quickly.
👉Algorithmic Understanding: Develop a strong understanding of algorithms and data structures for efficient problem-solving.
👉Code Readability: Write clean and readable code; it helps you and others understand and maintain it.
👉Time Management: Prioritize tasks, set deadlines, and manage your time effectively to stay productive.
👉Continuous Learning: Stay updated with industry trends, new technologies, and best practices to enhance your skills.
👉Testing: Embrace testing methodologies to ensure the reliability and correctness of your code.
👉Communication Skills: Effectively communicate with team members, stakeholders, and document technical decisions.
👉Collaboration: Foster a collaborative mindset, sharing knowledge and learning from your peers.
👉Stay Organized: Keep your codebase organized, use consistent naming conventions, and structure your projects logically.
👉Attention to Detail: Pay attention to details to avoid introducing errors and to produce high-quality code.
Efficiency comes from a combination of technical expertise, good practices, and effective collaboration.