Making things Persistent

Here are ways to make various things persistent in Linux:

Item	Persistence Method
Environment Variable	Add to ~/.bashrc (for user) or /etc/environment (for system-wide)
Mount Point	Add entry in /etc/fstab
Process	Use systemd service (/etc/systemd/system/your-service.service) or nohup/tmux/screen
Network Configuration	Configure in /etc/network/interfaces (Debian) or /etc/sysconfig/network-scripts/ (RHEL-based)
Firewall Rules	Save rules with iptables-save > /etc/iptables.rules and restore using systemd or /etc/network/if-up.d/
Kernel Parameters	Add to /etc/sysctl.conf and apply with sysctl -p
User Limits	Set in /etc/security/limits.conf
Time Zone	Set via timedatectl set-timezone <zone> (persists automatically)
DNS Configuration	Modify /etc/resolv.conf (use resolvconf or systemd-resolved for persistence)
Custom Commands on Boot	Add to /etc/rc.local, crontab -e (@reboot jobs), or a systemd service

Let me know if you need details on any of these! 🚀