Quick answer

Fix bad interpreter, weird syntax, and shell script errors caused by Windows CRLF line endings in files copied to Android.

This page separates the real Fix CRLF Lines cause from noise in the terminal output.

For Fix CRLF Lines, focus on Termux troubleshooting and use the output to decide the next small fix instead of reinstalling everything.

What to check

Use the guide for Fix CRLF Lines only after one short command can reproduce the problem.
For Fix CRLF Lines, keywords that usually matter are: CRLF, Lines.
If the first command for Fix CRLF Lines gives a different error, follow the new clue instead of forcing this guide.

For Fix CRLF Lines, replace placeholders only when they appear in the command.

pkg install dos2unix -y
dos2unix script.sh
dos2unix script.py
chmod +x script.sh
./script.sh

pkg install dos2unix -y — installs the package that the command or script depends on for Fix CRLF Lines.
dos2unix script.sh — checks the part of the Termux troubleshooting workflow that usually causes this issue for Fix CRLF Lines.
dos2unix script.py — checks the part of the Termux troubleshooting workflow that usually causes this issue for Fix CRLF Lines.
chmod +x script.sh — adds execute permission when Android or Git did not preserve it for Fix CRLF Lines.
./script.sh — checks the part of the Termux troubleshooting workflow that usually causes this issue for Fix CRLF Lines.

Change one thing at a time while testing Fix CRLF Lines.
If the Fix CRLF Lines error changes, read the new clue instead of repeating the old fix.
Keep screenshots or copied terminal text for Fix CRLF Lines; they make paid help faster if you need it.

Running the Fix CRLF Lines command from the home folder when the project is somewhere else.
Following a desktop Linux answer that ignores Android storage paths while fixing Fix CRLF Lines.
Closing Termux before copying the output that explains Fix CRLF Lines.

If fix crlf lines the guide still does not solve it, use the Store and send the exact output so the issue can be checked directly.