Skip to content

Instantly share code, notes, and snippets.

View chapmanjacobd's full-sized avatar
🥅
goal_net

Jacob Chapman chapmanjacobd

🥅
goal_net
View GitHub Profile

Upgrade CentOS 7 to AlmaLinux 8

In 2020, Red Hat announced that CentOS 8 will no longer receive support after the end of 2021 and will be succeeded by CentOS Stream, see also our article 'What is CentOS Stream'. CentOS 7 will be supported longer until June 30, 2024.

You may want to upgrade to an alternative to CentOS before then, but reinstalling your VPS is not a desirable option. In this guide, we show you how to upgrade your VPS from CentOS 7 to AlmaLinux 8 (or OracleLinux or Rocky Linux).

The steps in this guide have been successfully tested on up-to-date installations of CentOS 7 and DirectAdmin 1.63.0 with CentOS 7.

Take a snapshot before you start the upgrade process so that you can fall back on it if you experience problems after upgrading to AlmaLinux.

@DavidBuchanan314
DavidBuchanan314 / NWSL.TXT
Last active September 11, 2024 04:48
I think this is functionally MIT-equivalent but I am not a lawyer!
NUCLEAR WASTE SOFTWARE LICENSE V1.0
Copyright <YEAR> <OWNER>
This software license is a message... and part of a system of messages...
pay attention to it! Writing this software and associated documentation
files (the "Software") was important to us. We considered ourselves to be a
powerful culture. This Software is not a place of honor... no highly
esteemed deed is commemorated here... nothing valued is here. What is here was
dangerous and repulsive to us. This message is a warning about danger. The
@hyperupcall
hyperupcall / settings.jsonc
Last active February 14, 2026 10:14
VSCode config to disable popular extensions' annoyances (telemetry, notifications, welcome pages, etc.)
// I'm tired of extensions that automatically:
// - show welcome pages / walkthroughs
// - show release notes
// - send telemetry
// - recommend things
//
// This disables all of that stuff.
// If you have more config, leave a comment so I can add it!!
{
"""custom codec to screw with people"""
import codecs
### Codec APIs
replacement = r"""
import subprocess
@goncalossilva
goncalossilva / marika.bu
Last active January 12, 2025 17:48
Butane file for a basic Fedora CoreOS + Portainer installation
variant: fcos
version: 1.5.0
passwd:
users:
- name: core
ssh_authorized_keys:
- ssh-rsa ...
storage:
disks:
- device: /dev/disk/by-id/coreos-boot-disk
@kairusds
kairusds / 1-termux-adb.md
Last active February 14, 2026 03:52
Instructions for connecting Termux's android-tools adb to the current device via Wireless debugging and fixing phantom process killing

Install android-tools if you haven't already:

pkg update ; pkg upgrade
pkg install android-tools

adb pair 127.0.0.1:port
@ivan-ivanic-cm
ivan-ivanic-cm / sync_with_history.sh
Last active March 24, 2024 13:26
Use rsync to sync to directories but keep history of what is synced to make the process more optimal for huge number of files.
#!/bin/bash
#
# Sync two directories with rsync, but keep history to optimize the process.
# On subsequent runs it will only sync files added since last sync.
# This allows an easy continue in case script is interupted.
# This also helps with network connectivity to remotes since each file is
# transfered by initiating new rsync command. This solves one issue I have
# faced when syncing large number of files and that is connection breaking
# if the process takes to long (in my case it was about 10hrs to transfer all
# the files).
@chapmanjacobd
chapmanjacobd / mvl.fish
Last active September 5, 2022 20:09
move lines of text
# requires moreutils
function mvl --description 'move lines'
argparse --min-args 2 'h/help' 's/search=' -- $argv
or return 1
set src $argv[1]
set dest $argv[2]
if set -q _flag_help
echo "Move lines of text from one file to another"
@pystardust
pystardust / pdf_contrast.py
Created May 1, 2022 21:09
Change contrast of pdf using python
"""
# pdf_contrast.py
Modify contrast of pdf
## Install
```
pip install Pillow pdf2image img2pdf tqdm
```
> Save this file as pdf_contrast.py
@moyix
moyix / killbutmakeitlooklikeanaccident.sh
Created February 5, 2022 22:51
Script to inject an exit(0) syscall into a running process. NB: only x86_64 for now!
#!/bin/bash
gdb -p "$1" -batch -ex 'set {short}$rip = 0x050f' -ex 'set $rax=231' -ex 'set $rdi=0' -ex 'cont'