Programming in general:
- https://www.khanacademy.org/
- https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/
Web-based programming:
John Ko johnko
johnko
/ _aws_delete-default-vpc.sh
Last active
January 30, 2022 09:56
— forked from jokeru/aws_delete-default-vpc.sh
Script to delete all AWS default VPCs from all regions using AWS CLI
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| #/usr/bin/env bash | |
| set -euo pipefail | |
| exit 1 | |
| # Need the SystemAdministrator AWS SSO / IAM PermissionSet | |
| for region in $(aws ec2 describe-regions --query 'Regions[].RegionName' --output text); do | |
| echo "* Region ${region}" |
johnko
/ zfs_health.sh
Created
August 30, 2018 05:38
— forked from petervanderdoes/zfs_health.sh
ZFS Health Check Script
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| #! /usr/local/bin/bash | |
| # | |
| # Calomel.org | |
| # https://calomel.org/zfs_health_check_script.html | |
| # FreeBSD 9.1 ZFS Health Check script | |
| # zfs_health.sh @ Version 0.15 | |
| # Check health of ZFS volumes and drives. On any faults send email. In FreeBSD | |
| # 10 there is supposed to be a ZFSd daemon to monitor the health of the ZFS | |
| # pools. For now, in FreeBSD 9, we will make our own checks and run this script |
johnko
/ ubuntu-1404-preseed
Created
July 14, 2017 21:44
— forked from scottslowe/ubuntu-1404-preseed
This is a preseed file, written for Ubuntu Server 14.04.2, that provides a fully automated installation (assuming the presence of a PXE boot infrastructure and a local HTTP server to provide the installation files).
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| # Ubuntu Server automated installation | |
| # by Scott Lowe ([email protected]) | |
| d-i debian-installer/locale string en_US | |
| d-i console-setup/ask_detect boolean false | |
| d-i keyboard-configuration/layoutcode string us | |
| d-i netcfg/choose_interface select eth0 | |
| d-i netcfg/get_hostname string hostname | |
| d-i netcfg/get_domain string domain.com | |
| d-i netcfg/wireless_wep string |
johnko
/ instructions.md
Last active
May 27, 2025 18:59
Installing FreeBSD on a USB drive with ZFS using bsdinstall unattended
I typically wrap all these commands into a shell script that I can reuse, but here they are in steps.
Please read through all the instructions before actually performing the commands, just to avoid any surprises
Requirements:
- careful typing and copy/paste skills
- USB drive (8 GB+ ?) Make sure you don't need anything on that drive
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| # Edit your /etc/pf/pf.conf | |
| # If you are connected via ssh, make sure you allow connection to your ssh port! | |
| vi /etc/pf/pf.conf | |
| # Enable pf on your system | |
| sysrc pf_enable="YES" | |
| sysrc pf_rules="/etc/pf/pf.conf" | |
| # Start pf service/daemon | |
| # If you are connected via SSH, you may be disconnected |
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| (da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 00 28 70 00 00 08 00 | |
| (da0:umass-sim0:0:0:0): CAM status: CCB request completed with an error | |
| (da0:umass-sim0:0:0:0): Retrying command | |
| (da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 00 28 70 00 00 08 00 | |
| (da0:umass-sim0:0:0:0): CAM status: CCB request completed with an error | |
| (da0:umass-sim0:0:0:0): Retrying command | |
| (da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 00 28 70 00 00 08 00 | |
| (da0:umass-sim0:0:0:0): CAM status: CCB request completed with an error | |
| (da0:umass-sim0:0:0:0): Retrying command | |
| (da0:umass-sim0:0:0:0): READ(10). CDB: 28 00 00 00 28 70 00 00 08 00 |
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| Script started on Wed Nov 25 20:15:39 2015 | |
| # sh test.sh | |
| + zfs create tank/pool1 | |
| + zfs snap tank/pool1@now | |
| + zfs send tank/pool1@now | |
| + zfs recv tank/pool2 | |
| + hostname | |
| + zfs snap tank/pool1@a | |
| + date |
johnko
/ derpfs.py
Created
October 29, 2015 05:51
— forked from HarryR/derpfs.py
PyFilesystem driver for GridFS
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| #!/usr/bin/env python | |
| # based on the tahoelafs project | |
| # requires modification to pyfilesystem for mknod etc. | |
| # but provides enough to extract a minimal linux install | |
| # and then chroot into it :) | |
| import pymongo | |
| import gridfs | |
| import os | |
| import fs | |
| import math |
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