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6 Linux Misconfigurations I Regret Not Catching Sooner | by Faruk Ahmed | Apr, 2025
Member-only story 6 Linux Misconfigurations I Regret Not Catching Sooner -- Share Intro: Most Linux security issues aren’t caused by hackers — they’re caused by admins like us missing something small but critical. Over the years, I’ve made (and learned from) several misconfigurations that either opened me to attack or broke things at the worst moment. Here are six I regret not catching sooner — so you can avoid them entirely. 1. Forgetting to Set umask Defaults for New Users I once discovered that every new user’s files were world-readable by default. On shared systems, this can be a data privacy nightmare. ✅ Fix: Set a restrictive default in /etc/login.defs: UMASK 027 2. Running Services as Root I used to run web apps and backup scripts as root — for “simplicity.” One small bug could’ve compromised the whole server. ✅ Fix: Create specific service users: useradd -r -s /bin/false myappuser Then use sudo or systemd drop-ins to grant only what’s needed. 3. Not Enforcing Password Complexity
Member-only story
6 Linux Misconfigurations I Regret Not Catching Sooner
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Share
Intro:
Most Linux security issues aren’t caused by hackers — they’re caused by admins like us missing something small but critical. Over the years, I’ve made (and learned from) several misconfigurations that either opened me to attack or broke things at the worst moment. Here are six I regret not catching sooner — so you can avoid them entirely.
1. Forgetting to Set umask Defaults for New Users
I once discovered that every new user’s files were world-readable by default. On shared systems, this can be a data privacy nightmare.
✅ Fix: Set a restrictive default in /etc/login.defs:
UMASK 027
2. Running Services as Root
I used to run web apps and backup scripts as root — for “simplicity.” One small bug could’ve compromised the whole server.
✅ Fix: Create specific service users:
useradd -r -s /bin/false myappuser
Then use sudo or systemd drop-ins to grant only what’s needed.
