P02 · writing
Notes from the
inside of the job.
Written for the person who inherits this in five years, and for me next February. Long, specific, with the config in it. No newsletter, no comments, no “10x” anything.
28
Oct 2026
Setting up a Linux school
One directory, one home directory, one fleet. The LDAP tree and the
naming scheme behind it, SSSD on the clients, the NFS export and its
id-mapping, the autofs maps, quota and archive policy, and the first
login a new student actually experiences.
24 min read
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26
Oct 2026
A domain, a site, and an inbox
One HTML file on Cloudflare Pages, and mail that never becomes a mailbox.
The small print that catches people out: the catch-all covers the apex only,
a subdomain address needs its own records and rule, and how to prove the
routing works instead of assuming it does.
9 min read
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12
Oct 2026
Real-time programming notes
Latency budgets, the sources of jitter nobody budgets for, what the
scheduler will and will not promise, why the allocator is in your hot
path whether you invited it or not, and how to measure the tail instead
of the average.
18 min read
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Planned next: the lab imaging playbook, and a note on running Prometheus on a budget that is measured in favours.