ammarshah / reinstall_fedora44_grub_in_a_dual_boot_setup_with_windows11.md

Created June 30, 2026 17:51

Reinstall Fedora 44 GRUB in a dual-boot setup with Windows 11

Windows 11 updates sometimes hide or wipe the GRUB menu and your system boots directly into Windows. In this case, you can restore GRUB using a Fedora 44 Live USB.

Create a Live USB: Use a tool like Rufus (if using Windows) or Fedora Media Writer (which is pre-installed in Fedora if you have it on some other machine) to flash Fedora 44 onto a USB drive.
Boot from the USB: Restart your computer and press your manufacturer's Boot Menu Key (usually F12, F11, F10, or Esc) to select and boot from the USB in UEFI mode.
Open the Terminal: Once inside the Live environment, open the terminal.

ammarshah / transfer_data_between_fedora_and_waydroid.md

Last active May 6, 2026 20:15

Transfer data between Fedora and Waydroid

I'm using WhatsApp chats data as an example to backup to Fedora and then restore after fresh Waydroid installation.

Backup

Install Android Debug Bridge:

sudo dnf install android-tools

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 / set_up_your_own_git_server_on_fedora_using_gitea.md

Last active May 8, 2026 12:24

Set Up Your Own Git Server on Fedora 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 / an_encrypted_ssh_and_gpg_keys_backup_and_restore_guide.md

Last active March 22, 2026 12:05

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.

Backup Script (`backup-keys.sh`)

This script creates an encrypted backup of the following:

All SSH keypairs in ~/.ssh/ starting with id_ (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

What Are 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

TL;DR

fallocate: Allocates actual disk space (reserves it upfront)
truncate: Changes file size without allocating space (creates sparse files)

What are "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.

ammarshah / manage_multiple_ruby_versions_with_rbenv_on_fedora.md

Last active May 7, 2026 14:47

Setup rbenv on Fedora and use .ruby-version file to install the version your project requires

How to setup `rbenv` on Fedora

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 4.0.3

ammarshah / transfer_data_between_fedora_and_windows10.md

Last active May 7, 2026 15:05

Transfer Data between Two Laptops (Fedora and Windows 10) using a LAN Cable and FileZilla

Transferring files between a Fedora 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:

1. Connect Both Computers via LAN Cable

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.

2. Configure Network Settings

ammarshah / install_postgresql_18_on_fedora44.md

Last active June 15, 2026 21:00

Install PostgreSQL 18 on Fedora 44

1. Installation

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-44-x86_64/pgdg-fedora-repo-latest.noarch.rpm

# Disable all pgdg repos except pgdg18

Ammar Shah ammarshah