SysAdmin

A cheat sheet of the Linux tools I reach for when diagnosing disk, network, memory, CPU, and GPU — plus the one gotcha about how nvidia-smi’s utilization number actually works.

Practical knobs for getting more out of iperf — parallel streams, larger TCP windows, longer test durations, disabling Nagle’s algorithm, and when to switch to UDP or SCTP.

A self-contained shell script for building tmux from source into your home directory — useful on shared machines where you don’t have sudo access.

free is the standard Linux command for inspecting RAM usage. A walkthrough of its flags and how cached and buffered memory factor into the numbers it reports.

My personal checklist for setting up a fresh dev box — shell (zsh + oh-my-zsh), Vim, and tmux configuration that I keep coming back to.

A short note on using NTP to keep cluster nodes in time-sync, prompted by a build that broke when an NFS master and worker disagreed about the current time.