{"id":62,"date":"2025-11-28T16:14:19","date_gmt":"2025-11-29T00:14:19","guid":{"rendered":"https:\/\/rainier-it.com\/blog\/?p=62"},"modified":"2025-11-28T17:36:15","modified_gmt":"2025-11-29T01:36:15","slug":"create-a-backup-script-for-the-home-directory","status":"publish","type":"post","link":"https:\/\/rainier-it.com\/blog\/create-a-backup-script-for-the-home-directory\/","title":{"rendered":"Create a Backup Script for the \/home Directory"},"content":{"rendered":"\n
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When I first started using Gemini, version 2, I prompted a very simple, not much context “one shot prompt”: “Create a bash script that backs up the \/home directory. Give it all the bells and whistles.”<\/p>\n\n\n\n

And the AI responded, of course: “Of course. Here is a comprehensive bash script to back up your \/home<\/code> directory, complete with features for robust and automated use.” <\/p>\n\n\n\n

And proceeded to give me this:<\/p>\n\n\n\n

“Here is the complete, polished guide designed for publication. It includes the robust backup script (with the standard gzip<\/code> you requested), updated with rsync<\/code> capabilities, and clear, beginner-friendly instructions on how to set up the necessary SSH keys.”<\/p>\n\n\n\n

Alright, I did more than one shot and added a little extra functionality…enjoy! ~Christopher<\/p>\n\n\n\n

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\ud83d\udee1\ufe0f The Ultimate Automated Offsite Backup Guide<\/h1>\n\n\n\n

This guide will help you set up a professional-grade backup system for your Linux \/home<\/code> directory. It creates a compressed archive, checks for disk space, keeps your local drive clean, and\u2014most importantly\u2014automatically syncs everything to a remote server<\/strong>.<\/p>\n\n\n\n

\ud83d\udccb Prerequisites<\/h2>\n\n\n\n

Before using the script, you need two things:<\/p>\n\n\n\n

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  1. A Remote Server:<\/strong> Another computer or VPS (like AWS, DigitalOcean, or a friend’s house) with SSH access.<\/li>\n\n\n\n
  2. SSH Keys:<\/strong> The script needs to log in to the remote server without typing a password.<\/li>\n<\/ol>\n\n\n\n

    \ud83d\udd11 Setting up Password-less SSH (Do this first!)<\/h3>\n\n\n\n

    Run these commands on the source computer<\/strong> (the one you are backing up):<\/p>\n\n\n\n

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    1. Generate a generic key pair (if you haven’t already):<\/strong> ssh-keygen -t rsa -b 4096 # Press Enter through all prompts. Do NOT set a passphrase for this key.<\/code><\/li>\n\n\n\n
    2. Copy the key to your remote server:Replace user and remote_server_ip with your actual details. ssh-copy-id user@remote_server_ip<\/code><\/li>\n\n\n\n
    3. Test it: Type ssh user@remote_server_ip<\/code>. If it logs you in without asking for a password, you are ready to rock! \ud83c\udfb8<\/li>\n<\/ol>\n\n\n\n
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      \ud83d\udcdc The Script<\/h2>\n\n\n\n

      Save this code as \/usr\/local\/sbin\/backup_home.sh<\/code>:<\/p>\n\n\n\n

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