How to fix fatal: renaming 'File.txt' failed: Invalid argument (case-insensitive filesystem) in Git

# Step 1: Rename to a temporary name
git mv File.txt file-temp.txt

# Step 2: Rename from temporary to final name
git mv file-temp.txt file.txt

# Step 3: Commit the change
git commit -m "Rename File.txt to file.txt (case change)"

# Rename all .TXT files to .txt
for f in *.TXT; do
  temp="${f%.TXT}-temp.txt"
  final="${f%.TXT}.txt"
  git mv "$f" "$temp"
  git mv "$temp" "$final"
done
git commit -m "Normalize file extensions to lowercase"

# Force the case-only rename
git mv -f File.txt file.txt

# Commit the change
git commit -m "Rename File.txt to file.txt"

git --version

# Remove the old filename from Git's index (not from disk)
git rm --cached File.txt

# Rename the actual file (use your OS file manager or command)
# On Windows:
ren File.txt file.txt

# On macOS/Linux:
mv File.txt file.txt

# Add the file with the new name
git add file.txt

# Commit
git commit -m "Rename File.txt to file.txt"

# Remove from index
git rm --cached File.txt

# Rename via temporary file
mv File.txt temp-file.txt
mv temp-file.txt file.txt

# Add back
git add file.txt

# Commit
git commit -m "Change file case"

# Check current setting
git config --get core.ignorecase

# On Windows/macOS, this is typically 'true' by default

# Set to false temporarily
git config core.ignorecase false

# Now try the rename
git mv File.txt file.txt

# Restore the setting
git config core.ignorecase true

# Commit
git commit -m "Rename file with case change"

# Open WSL terminal
wsl

# Navigate to your repository
cd /mnt/c/path/to/your/repo

# Perform the rename directly
git mv File.txt file.txt

# Commit
git commit -m "Rename File.txt to file.txt"

# Exit WSL
exit

# Run a Git container with your repo mounted
docker run -it --rm -v "$(pwd):/repo" -w /repo alpine/git sh

# Inside the container, perform the rename
git mv File.txt file.txt
git commit -m "Rename File.txt to file.txt"

# Exit the container
exit

# SSH to your Linux server
ssh user@linux-server

# Clone or access the repository
cd /path/to/repo

# Perform the rename
git mv File.txt file.txt
git commit -m "Rename File.txt to file.txt"
git push

# Back on Windows/macOS, pull the changes
git pull

# First, stash any local changes
git stash

# Fetch the latest changes
git fetch origin

# Check what files are affected
git diff --name-only HEAD origin/main

# If there are case conflicts, remove the local file from index
git rm --cached File.txt

# Reset to the remote state
git reset --hard origin/main

# Or, if you need to preserve local changes:
git checkout --theirs File.txt
git add file.txt

# Create or update .gitattributes
echo "* text=auto" >> .gitattributes
git add .gitattributes
git commit -m "Add .gitattributes for consistent handling"

# List all tracked files, sort case-insensitively, find duplicates
git ls-files | sort -f | uniq -di

#!/bin/bash
# rename-to-lowercase.sh

# Find all files and rename to lowercase
git ls-files | while read file; do
  dir=$(dirname "$file")
  base=$(basename "$file")
  lower=$(echo "$base" | tr '[:upper:]' '[:lower:]')

  if [ "$base" != "$lower" ]; then
    echo "Renaming: $file -> $dir/$lower"
    git mv "$file" "$dir/temp-$base"
    git mv "$dir/temp-$base" "$dir/$lower"
  fi
done

git commit -m "Normalize all filenames to lowercase"

# Get all tracked files
$files = git ls-files

foreach ($file in $files) {
    $dir = Split-Path $file -Parent
    $name = Split-Path $file -Leaf
    $lower = $name.ToLower()

    if ($name -cne $lower) {
        $temp = if ($dir) { "$dir/temp-$name" } else { "temp-$name" }
        $final = if ($dir) { "$dir/$lower" } else { $lower }

        Write-Host "Renaming: $file -> $final"
        git mv $file $temp
        git mv $temp $final
    }
}

git commit -m "Normalize all filenames to lowercase"

# Install git-filter-repo first
pip install git-filter-repo

# Rename all paths to lowercase throughout history
git filter-repo --path-rename 'File.txt:file.txt'