41 lines
1.2 KiB
Bash
41 lines
1.2 KiB
Bash
#!/bin/bash
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# Detect the main disk by finding the partition mounted on root ('/')
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main_disk=$(df / | tail -1 | awk '{print $1}')
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mount_point=$(df / | tail -1 | awk '{print $6}')
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# Get available space on the partition in GB
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available_space=$(df -BG $mount_point | tail -1 | awk '{print $4}' | sed 's/G//')
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# Calculate 5% of the available space, and ensure it's within the limits (max 30GB)
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swap_size=$((available_space * 5 / 100))
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if [ $swap_size -gt 30 ]; then
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swap_size=30
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elif [ $swap_size -lt 1 ]; then
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echo "Not enough disk space to create a swap file."
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exit 1
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fi
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echo "Creating a ${swap_size}GB swap file at /swapfile..."
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# Create the swap file
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sudo fallocate -l ${swap_size}G /swapfile
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sudo chmod 600 /swapfile
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sudo mkswap /swapfile
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sudo swapon /swapfile
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echo "Swap file of ${swap_size}GB created and activated."
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# Ask if the user wants to persist the swap after reboot
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read -p "Do you want to persist the swap file after reboot? (y/n): " persist_swap
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if [[ "$persist_swap" == "y" || "$persist_swap" == "Y" ]]; then
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echo "/swapfile none swap sw 0 0" | sudo tee -a /etc/fstab
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echo "Swap file added to /etc/fstab."
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else
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echo "Swap file will not persist after reboot."
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fi
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# Show swap summary
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sudo swapon --show
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