TCP 3-Way Handshake: How Every Connection Begins [Under the Hood]
hafeez@unixshadow: ~/capture.pcap hafeez@unixshadow:~$ sudo tcpdump -i eth0 ‘tcp port 443’ # the 3-way handshake, live TCP 3-Way HandshakeHow Every Connection […]
Under the Hood
Visual explainers: Linux internals, networking, and sysadmin concepts.
The OSI Model: 7 Layers of Networking [Under the Hood]
hafeez@unixshadow: ~/packet.bin hafeez@unixshadow:~$ ping -c1 203.0.113.7 # then: what each layer added on the way down The OSI Model7 Layers […]
Linux Boot Sequence: From Power-On to Login Prompt [Under the Hood]
hafeez@unixshadow: /var/log/boot.log hafeez@unixshadow:~$ journalctl –list-boots | head -1 # what actually happens at boot Linux Boot SequenceFrom Power-On to Login […]