estimate available space

disk-space.sh

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+#!/bin/bash
+
+# Total disk space in bytes (replace /dev/sda1 with your actual disk)
+total_blocks=$(df --output=size /var/lib/docker/volumes | awk 'NR==2')
+
+# Convert total blocks to bytes
+total_disk_space=$((total_blocks * 1024))
+
+# Used disk space in bytes
+reserved=${1:-50}
+used_disk_space=$(( reserved * 1024 * 1024 * 1024 ))
+
+# Calculate 10% of total disk space
+ten_percent=$(( total_disk_space / 10 ))
+
+# Calculate total available disk space
+total_available_space=$(( total_disk_space - used_disk_space - ten_percent ))
+
+#echo "$total_disk_space"
+#echo "$used_disk_space"
+#echo "$ten_percent"
+
+# Convert total available space to human-readable format
+#total_available_space_human=$(echo "$total_available_space" | awk '{ split( "B KB MB GB" , v ); s=1; while( $1>1024 ){ $1/=1024; s++ } print int($1) v[s] }')
+#total_available_space_human=$(numfmt --to=iec-i --suffix=B "$total_available_space")
+
+available_space_gb=$(echo "scale=0; $total_available_space / 1073741824" | bc)
+
+echo "$available_space_gb"