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cybersecurity • 4 min read

15-Minute Linux Hardening Checklist

Copy-pasteable steps that raise the floor without slowing anyone down.

OBIT
Orange Blossom IT Team
Orange Blossom IT
#linux #hardening #security
Terminal with security commands and lock icon overlay
  1. Create non-root sudo user; disable password auth in SSH
  2. Fail2ban + ufw (deny by default)
  3. Automatic security updates
  4. Set timezone/ntp, correct logs
  5. Backup agent (restic) + health check
adduser ops && usermod -aG sudo ops
sed -i 's/^#PasswordAuthentication yes/PasswordAuthentication no/' /etc/ssh/sshd_config
ufw default deny incoming && ufw allow 22 && ufw enable
apt install unattended-upgrades && dpkg-reconfigure -plow unattended-upgrades

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