Exit Codes

Quick answer

Understand why commands return non-zero status, how to check $?, and how exit codes help debug scripts.

Exit Codes is a focused guide for the exact situation described below.

For Exit Codes, focus on Termux packages and Android integration and use the output to decide the next small fix instead of reinstalling everything.

What to check

• For Exit Codes, read the first line that names a missing file, package, port, module, or permission.
• For Exit Codes, keywords that usually matter are: Exit, Codes.
• If the first command for Exit Codes gives a different error, follow the new clue instead of forcing this guide.

Copyable command

For Exit Codes, replace placeholders only when they appear in the command.

python script.py
echo $?
command_that_might_fail || echo "command failed"

Read the output

1. python script.py — runs the script directly so the first traceback can be read for Exit Codes.
2. echo $? — checks the part of the Termux packages and Android integration workflow that usually causes this issue for Exit Codes.
3. command_that_might_fail || echo "command failed" — checks the part of the Termux packages and Android integration workflow that usually causes this issue for Exit Codes.

Fix in a safe order

1. Save the Exit Codes output before editing files.
2. Change one thing at a time while testing Exit Codes.
3. If the Exit Codes error changes, read the new clue instead of repeating the old fix.

Common mistakes

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

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