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swap-increase
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Update swap.sh

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colin 2024-09-13 16:43:10 -04:00
parent 8301229173
commit 69140e1644
1 changed files with 49 additions and 29 deletions
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swap.sh
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@ -1,40 +1,60 @@
#!/bin/bash #!/bin/bash
# Detect the main disk by finding the partition mounted on root ('/') # Function to create swap file
main_disk=$(df / | tail -1 | awk '{print $1}') create_swapfile() {
mount_point=$(df / | tail -1 | awk '{print $6}') # Detect the main disk by finding the partition mounted on root ('/')
mount_point=$(df / | tail -1 | awk '{print $6}')
# Get available space on the partition in GB # Get available space on the partition in GB
available_space=$(df -BG $mount_point | tail -1 | awk '{print $4}' | sed 's/G//') available_space=$(df -BG $mount_point | tail -1 | awk '{print $4}' | sed 's/G//')
# Calculate 5% of the available space, and ensure it's within the limits (max 30GB) # Calculate 5% of the available space, and ensure it's within the limits (max 30GB)
swap_size=$((available_space * 5 / 100)) swap_size=$((available_space * 5 / 100))
if [ $swap_size -gt 30 ]; then if [ $swap_size -gt 30 ]; then
swap_size=30 swap_size=30
elif [ $swap_size -lt 1 ]; then elif [ $swap_size -lt 1 ]; then
echo "Not enough disk space to create a swap file." echo "Not enough disk space to create a swap file."
exit 1 exit 1
fi
echo "Creating a ${swap_size}GB swap file at /swapfile..."
# Remove existing swapfile if it exists
if [ -f /swapfile ]; then
sudo swapoff /swapfile
sudo rm /swapfile
echo "Existing swapfile removed."
fi
# Create the swap file
sudo fallocate -l ${swap_size}G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
echo "Swap file of ${swap_size}GB created and activated."
}
# Function to persist the swap file across reboots
persist_swapfile() {
echo "/swapfile none swap sw 0 0" | sudo tee -a /etc/fstab
echo "Swap file added to /etc/fstab."
}
# Check if --persist flag is passed
persist=false
if [ "$1" == "--persist" ]; then
persist=true
fi fi
echo "Creating a ${swap_size}GB swap file at /swapfile..." # Main script execution
create_swapfile
# Create the swap file if [ "$persist" = true ]; then
sudo fallocate -l ${swap_size}G /swapfile persist_swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
echo "Swap file of ${swap_size}GB created and activated."
# Ask if the user wants to persist the swap after reboot
read -p "Do you want to persist the swap file after reboot? (y/n): " persist_swap
if [[ "$persist_swap" == "y" || "$persist_swap" == "Y" ]]; then
echo "/swapfile none swap sw 0 0" | sudo tee -a /etc/fstab
echo "Swap file added to /etc/fstab."
else else
echo "Swap file will not persist after reboot." echo "Swap file will not persist after reboot."
fi fi
# Show swap summary # Show current swap status
sudo swapon --show sudo swapon --show