net-tools is a popular Linux Open-Source package includes the important user-space tools for controlling the network subsystem of the Linux kernel. Which includes arp, rarp, ifconfig, ipmaddr, mii-tool, netstat, rarp,…
Refer:kernel.org ↗net/ ↗net/core – core component of Linux Kernel network subsystem ↗net/core/dev.c ↗net/core/dst.c ↗net/core/skbuff.c ↗net/sched – packet scheduler routines ↗net/socket.c – An implementation of the SOCKET network access protocol ↗
Here are the steps as discussed in the video to enable Ubuntu boot-time Grub boot menu and timeout: