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generalization.sh

Description

generalization.sh is a command line tool which generalize (sysprep) system for CentOS 7, 8 and Stream 8.

Features

generalization.sh removes or regenerates following system-specific files and configurations.

  • Log files (mainly in /var/log/*)
  • Received emails
  • cron configurations
  • DHCP status files
  • YUM cache files
  • YUM UUID (Only CentOS 7)
  • YUM transaction history (Optional)
  • SSH host keys
  • .ssh directories (contain authorized_keys and known_hosts)
  • tmp files
  • Firewall configurations
  • Hostname
  • NIC configurations (ex. static ip address, gateway, UUID, etc.)
  • machine-id (>= CentOS 7.1)
  • Command execution history (.bash_history)

Usage

You can run this script from bash command line. This script needs root privileges. You should use this script with source command as shown below. It's because some features need to set environment variables for root.

source generalization.sh

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Generalize Operating System using for VM template. Compatible with CentOS 7, 8 and Stream 8.

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