$ sudo apt install curl ca-certificates
$ sudo install -d /usr/share/postgresql-common/pgdg
$ sudo curl -o /usr/share/postgresql-common/pgdg/apt.postgresql.org.asc --fail https://www.postgresql.org/media/keys/ACCC4CF8.asc
Ammar Shah ammarshah
ammarshah
/ all_email_provider_domains.txt
Last active
December 10, 2025 22:42
A list of all email provider domains (free, paid, blacklist etc). Some of these are probably not around anymore. I've combined a dozen lists from around the web. Current "major providers" should all be in here as of the date this is created.
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| 0-mail.com | |
| 007addict.com | |
| 020.co.uk | |
| 027168.com | |
| 0815.ru | |
| 0815.su | |
| 0clickemail.com | |
| 0sg.net | |
| 0wnd.net | |
| 0wnd.org |
ammarshah
/ install_postgresql_17_on_ubuntu.md
Last active
November 16, 2025 12:46
Install PostgreSQL 17 on Ubuntu 24.04
ammarshah
/ set_up_your_own_git_server_on_fedora_43_using_gitea.md
Last active
November 8, 2025 13:49
Set Up Your Own Git Server on Fedora 43 Using Gitea
Gitea is a self-hosted, open-source Git service similar to GitHub, but lightweight, free, and perfect for personal or local setups.
While the official Gitea installation guide is simple, the process you'll see here might seem a bit extra - and that's because I wanted something very specific.
Let's put it this way: I wanted to run my own local github.com, completely offline.
My top priority was to host everything locally on my own network, where the host and client machines could communicate both wirelessly (through a Wi-Fi router) and directly through a LAN cable (peer-to-peer).
ammarshah
/ set_up_your_own_git_server_on_windows_10_using_gitea.md
Last active
November 8, 2025 13:49
Set Up Your Own Git Server on Windows 10 Using Gitea
Gitea is a self-hosted, open-source Git service similar to GitHub, but lightweight, free, and perfect for personal or local setups.
While the official Gitea installation guide is simple, the process you'll see here might seem a bit extra - and that's because I wanted something very specific.
Let's put it this way: I wanted to run my own local github.com, completely offline.
My top priority was to host everything locally on my own network, where the host and client machines could communicate both wirelessly (through a Wi-Fi router) and directly through a LAN cable (peer-to-peer).
ammarshah
/ manage_multiple_ruby_versions_with_rbenv_in_fedora43.md
Last active
November 4, 2025 06:38
Setup rbenv on Fedora 43 and use .ruby-version file to install the version your project requires
This guide will not install a specific Ruby version you want, although, it will setup rbenv so you can manage multiple Ruby versions.
It assumes that the project that requires a specific Ruby version has a file .ruby-version in the root of the project. So, simply running rbenv install from project root directory will use the version specified in that file and install it.
But if you still want to install a specific version of Ruby without using .ruby-version file, you can do so using:
$ rbenv install 3.4.6
ammarshah
/ transfer_data_between_fedora43_and_windows10.md
Last active
November 4, 2025 06:36
Transfer Data between Two Laptops (Fedora 43 and Windows 10) using a LAN Cable and FileZilla
Transferring files between a Fedora 43 machine and a Windows 10 machine over a LAN using FileZilla involves a few key steps. The general process is to set up one machine as an FTP server (Fedora) and the other as an FTP client (Windows). Here's how you can do that:
- Plug one end of the LAN cable into the Ethernet port of the first laptop.
- Plug the other end of the LAN cable into the Ethernet port of the second laptop.
ammarshah
/ install_postgresql_18_on_fedora.md
Last active
November 4, 2025 06:18
Install PostgreSQL 18 on Fedora 43
You can follow the PostgreSQL installation steps from its official website and you'll be good to go but I prefer to keep only the latest version's repo i.e. pgdg18, since the first command would add pgdg repos for version 13 through 18.
# Add the pgdg repo
sudo dnf install https://download.postgresql.org/pub/repos/yum/reporpms/F-43-x86_64/pgdg-fedora-repo-latest.noarch.rpm
# Disable all pgdg repos except pgdg18
ammarshah
/ an_encrypted_ssh_and_gpg_keys_backup_and_restore_guide.md
Last active
October 9, 2025 02:33
Encrypted SSH and GPG Keys Backup & Restore
A pair of bash scripts to securely backup and restore your SSH keys, GPG keys, and Git configuration with symmetric encryption.
This script creates an encrypted backup of the following:
- All SSH keypairs in
~/.ssh/starting withid_(e.g.,id_rsa,id_ed25519) - All GPG keys (private keys, public keys, and trust database)
ammarshah
/ force_garbage_collection_of_dangling_objects_in_git.md
Created
October 6, 2025 06:48
Git: Force Garbage Collection of Dangling Objects
Dangling objects are commits, blobs, or trees that are no longer referenced by any branch, tag, or the reflog. They exist in Git's object database but aren't part of any reachable history.
commit A -- commit B -- commit C (HEAD)
\
commit B' (dangling after amending B)
ammarshah
/ how_to_create_dummy_files_in_linux.md
Created
October 6, 2025 04:26
How to Create Dummy/Test Files in Linux
fallocate: Allocates actual disk space (reserves it upfront)truncate: Changes file size without allocating space (creates sparse files)
Sparse files have "holes" - regions that claim to exist but have no actual data. When read, the OS returns zeros for holes without storing them on disk. This saves space but may cause issues if the disk fills up later when you try to write real data.
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