DEV Community: Selva sahayam Jeniston

Docker

Selva sahayam Jeniston — Mon, 28 Apr 2025 14:27:00 +0000

Steps to Build a Docker Image

Create Your Project Directory

Add Your Application Files
Example: app.py (for Python) or index.js (for Node.js), etc.

Create a Dockerfile
Create a requirements.txt (if needed)
Docker Command to Build the Image

docker images

docker build -t my-app-image .

Build the Docker Image
docker build -t my-flask-image .

See Running Containers
docker ps

Git & GitHub

Selva sahayam Jeniston — Mon, 28 Apr 2025 14:27:00 +0000

git diff Description:

Shows the differences between files in your working directory and the index (staging area).

Command:
git diff

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git log Description:

Displays the commit history of the current branch with details such as commit ID, author, and date.

Command:
git log

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git clone Description:

Clones an existing remote Git repository into a local directory.
git clone https://github.com/username/repository.git

Command:
git clone https://github.com/Jeniston007/24MCR096.git

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4.git fork
Description:

Creates a personal copy of someone else's repository into your GitHub account.

5.git pull
Description:

Fetches and integrates changes from the remote repository into the current branch.

Command:
git pull origin main

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6.git push
Description:

Sends committed changes to a remote repository like GitHub.

Command:
git push origin main

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git blame Description:

Shows who last modified each line of a file and when.

Command:
git blame filename

git merge conflict Description:

Occurs when changes from different branches conflict during a merge.

Command to simulate:

Make conflicting changes in two branches
git merge feature_login

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9.git branch
Description:

Lists existing branches or creates a new one.

Command:
git branch

To create a new branch
git branch

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git ignore Description:

Used to exclude files and directories from version control by specifying them in a .gitignore file.

Command:

Create or edit .gitignore file and add the filenames or patterns to exclude.

MACHINE LEARNING

Selva sahayam Jeniston — Thu, 24 Apr 2025 03:34:34 +0000

Step-by-Step Git Commands Execution:
Initialize a Git repository:
git init
Creates a new Git repository in the folder 24MCR001.
Add a file to staging area:
git add 24MCR001.txt
Adds 24MCR001.txt to the staging area.
Commit the file:
git commit -m "Added Personal Details"
Creates a commit with the message "Added Personal Details".
Check Git status:
git status
Shows that 24MCR001.txt has been modified but not staged.
View commit log:
git log
Displays the commit history (one commit at this point).
Add remote GitHub repository:
git remote add origin https://github.com/Ajay978680/24MCR001.git
Links the local repository to a remote GitHub repo.
Check current branch:
git branch
Shows the current branch is master.
Rename branch from master to main:
git branch -M main
Renames the current branch to main.
Set Git global config for email and username:
git config --global user.email "sparkajay001@gmail.com"
git config --global user.name "Ajay978680"
Sets your global Git identity.
Push code to remote repo for the first time:
git push -u origin main
Pushes the main branch to GitHub and sets upstream tracking.

Then , Again We will Modify or add new file means we need to follow the same steps, like

git add .
git commit -m “message”
git push origin main