| #!/usr/bin/env bash | |
| # Author: Austin St. Aubin <austinsaintaubin@gmail.com> | |
| # Date: 2026-07-29 | |
| # | |
| # fan-toggle: Toggle ThinkPad fans between MAX (for a duration) and AUTO. | |
| # Usage: | |
| # fan-toggle [DURATION] [SPEED] | |
| # DURATION: 90, 90s, 5m, 1h, inf (or "indefinite") (default 5m) | |
| # SPEED : 0-255 or N% (default 100%) | |
| # inf duration skips the auto-revert timer — runs until toggled off. |
| #!/usr/bin/env bash | |
| # License: https://r15ch13.mit-license.org | |
| shopt -s nullglob | |
| lastgroup="" | |
| for g in `find /sys/kernel/iommu_groups/* -maxdepth 0 -type d | sort -V`; do | |
| for d in $g/devices/*; do | |
| if [ "${g##*/}" != "$lastgroup" ]; then | |
| echo -en "Group ${g##*/}:\t" | |
| else |
Public-key infrastructure (PKI) is an umbrella term for everything that has to do with keys and certificates.
This is a quick overview of the important stuff.
Public-key cryptography involves a key pair: a public key and a private key. Each entity has their own. The public key can be shared around, the private key is secret.
