E: Sub-process /usr/bin/apt-get returned an error code (100)_
E: Sub-process /usr/bin/apt-get returned an error code (100)
When Debian throws E: Sub-process /usr/bin/apt-get returned an error code (100), the system diagnostics have flagged a condition known as "E: Sub-process /usr/bin/apt-get returned an error code (100)". Most fixes for this error are straightforward and don't require wiping your drive.
What Actually Happened
Package manager encountered: an underlying apt-get operation failed; scrolling up in the terminal output usually shows the real cause.
Symptoms
APT command failed: 'E: Sub-process /usr/bin/apt-get returned an error code (100)'
Common Causes
- Package state: an underlying apt-get operation failed; scrolling up in the terminal output usually shows the real cause
How to Fix It
-
01
Refresh package index:
sudo apt update -
02
Fix broken dependencies:
sudo apt --fix-broken install -
03
Configure pending packages:
sudo dpkg --configure -a
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Root Cause Breakdown
dpkg/APT constraint resolver aborted transaction.
Should You Worry?
Safe. Package manager halts to prevent further corruption.
Power-User Tip
Always run sudo apt update before attempting repair commands.
Always free