Wandering Thoughts archives

2020-03-31: My home DSL link really is fast enough to make remote X acceptable
2020-03-30: It's worth documenting the obvious (before it stops being obvious)
Notes on Grafana 'value groups' for dashboard variables
2020-03-29: I set up Python program options and arguments in a separate function
2020-03-28: The Prometheus host agent's CPU utilization metrics can be a bit weird
2020-03-27: OpenBSD's 'spinning' CPU time category
2020-03-26: Any KVM over IP systems need to be on secure networks
2020-03-25: The problem of your (our) external mail gateway using internal DNS views
2020-03-23: How we set up our ZFS filesystem hierarchy in our ZFS pools
Why we use 1U servers, and the two sides of them
2020-03-22: Avoiding the 'dangling else' language problem with mandatory block markers
2020-03-20: Wishing for a remote resilient server environment (now that it's too late)
2020-03-19: Make sure to keep useful labels in your Prometheus alert rules
Sorting out Go's 'for ... = range ..' and when it copies things
2020-03-18: Understanding X mouse cursors (and their several layers of history)
2020-03-17: A problem I'm having with my HiDPI display, remote X, and (X) cursors
2020-03-16: How Firefox could support automatically using local DNS over HTTPS servers
2020-03-15: Why the choice of DNS over HTTPS server needs to be automatic (a sysadmin view)
2020-03-14: The two meanings of 'DNS over HTTPS' today
2020-03-13: Sensible heuristics for when to use DNS over HTTPS can't work for us
2020-03-12: TLS increasingly exists in three different worlds
2020-03-11: Some notes on the state of DNS over HTTPS in Firefox (as of March 2020)
2020-03-09: Logging out of HTTP Basic Authentication in Firefox
What makes our Ubuntu updates driver program complicated
2020-03-08: How we sort of automate updating system packages across our Ubuntu machines
2020-03-07: Linux's iowait statistic and multi-CPU machines
2020-03-05: The problem of Unix iowait and multi-CPU machines
2020-03-04: Unix's iowait% is a narrow and limited measure that can be misleading
2020-03-03: One impact of the dropping of Python 2 from Linux distributions
2020-03-02: More or less what versions of Go support what OpenBSD releases (as of March 2020)
2020-03-01: The situation with Go on OpenBSD
2020-02-29: OpenBSD versus Prometheus (and Go)
2020-02-28: One reason for Go to prefer providing indexes in for ... range loops
2020-02-27: Some alert inhibition rules we use in Prometheus Alertmanager
2020-02-26: The magic settings to make a bar graph in Grafana
The browsers are probably running the TLS show now
2020-02-25: The basics of /etc/mailcap on Ubuntu (and Debian)
2020-02-23: Webmail providers (and others) hiding user IPs was the right decision
Our (unusual) freedom to use alerts as notifications
2020-02-22: Will common motherboards ever have very many NVMe drive slots?
2020-02-21: An appreciation for Cinnamon's workspace flipping keyboard shortcuts
2020-02-20: Link: Stop Using Encrypted Email
2020-02-19: Load average is now generally only a secondary problem indicator
How and why we regularly capture information about running processes
2020-02-17: The uncertainty of an elevated load average on our Linux IMAP server
The case of mysterious load average spikes on our Linux login server
2020-02-16: With sudo, complex argument validation is best in cover scripts
2020-02-14: Unix's /usr split and standards (and practice)
The /bin versus /usr split and diskless workstations
2020-02-12: You can't delegate a ZFS administration permission to delete only snapshots
Some git aliases that I use
2020-02-10: Doing frequent ZFS scrubs lets you discover problems close to when they happened
2020-02-09: I'm likely giving up on trying to read Fedora package update information
Code dependencies and operational dependencies
2020-02-08: Ways that I have lost the source code for installed programs
2020-02-07: I frequently use dependencies because they enable my programs to exist
2020-02-05: The drawback of having a dynamic site with a lot of URLs on today's web
2020-02-04: What 'is' translates to in CPython bytecode
The place of the 'is' syntax in Python
2020-02-02: What we do to enable us to grow our ZFS pools over time
Some unusual and puzzling bad requests for my CSS stylesheet
2020-01-31: Finding out what directories exist with only basic shell builtins (a Unix shell trick)
2020-01-30: Some notes on Python's email.header.decode_header()
2020-01-29: Some effects of the ZFS DVA format on data layout and growing ZFS pools
Why ZFS is not good at growing and reshaping pools (or shrinking them)
2020-01-28: More badly encoded MIME Content-Disposition headers
2020-01-26: The real world is mutable (and consequences for system design)
How big our Prometheus setup is (as of January 2020)
2020-01-25: A network interface losing and regaining signal can have additional effects (in Linux)
2020-01-24: Go compared to Python for small scale system administration scripts and tools
2020-01-23: What we've written in Go at work and how it came about (as of January 2020)
2020-01-22: Why I've come to like that Go's type inference is limited
2020-01-20: The value of automation having ways to shut it off (a small story)
2020-01-19: Python 2, Apache's mod_wsgi, and its future in Linux distributions
Why a network connection becoming writable when it succeeds makes sense
2020-01-18: CUPS's page log, its use of SNMP, and (probably) why CUPS PPDs turn that off
2020-01-17: The question of how long Python 2 will be available in Linux distributions
2020-01-15: How Go's net.DialContext() stops things when the context is cancelled
Stopping udev from renaming your VLAN interfaces to bad names
2020-01-13: We may not want to use OCSP stapling in our web servers
Link: Mercurial's Journey to and Reflections on Python 3
2020-01-12: Sorting out the dates of Python 2's 'end of life'
How I now think you want to configure Apache for OCSP stapling
2020-01-10: OCSP stapling and what web servers and browsers do in the face of errors
Fedora 31 has decided to allow (and have) giant process IDs (PIDs)
2020-01-08: Why I use both uBlock Origin and uMatrix
My Firefox addons as of Firefox '74' (the current development version)
2020-01-07: eBPF based tools are still a work in progress on common Linuxes
2020-01-06: How I move files between iOS devices and Unix machines (using SSH)
2020-01-05: Why I prefer the script exporter for exposing script metrics to Prometheus
2020-01-04: Three ways to expose script-created metrics in Prometheus
2020-01-03: How job control made the SIGCHLD signal useful for (BSD) Unix
2020-01-01: The good and bad of errno in a traditional Unix environment
By month for 2020: Jan Feb Mar; before 2020.

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