1. Goal
Add persistent static routes without relying on external tools or unavailable services.
2. Files and components involved
/etc/rc.d/rc.local
/sbin/ip
/usr/sbin/traceroute3. Operational flow
ip route add network via gateway dev eth0
add command in rc.local
chmod +x /etc/rc.d/rc.local4. Operational verification
ip route show
ip route get host
traceroute host
ping host5. Practical notes
Apply network changes from a local console or with an emergency session ready, so you do not lose SSH access.
Every network change should have a rollback path ready: a second console, KVM access, or a temporary command to remove.
Quick checklist
[ ] Backup or copy of the existing configuration completed
[ ] Files and commands updated as expected
[ ] Local test completed successfully
[ ] Logs or final output verified
[ ] Rollback procedure documented