Check Disk Usage

Displays disk usage for all physical drives with total, used, and free space in GB plus percentages. Filters out tmpfs and virtual filesystems.

Script


#!/bin/bash
 
printf "%-8s %12s %12s %12s %12s %12s\n" "Drive" "Total(GB)" "Used(GB)" "Free(GB)" "Used(%)" "Free(%)"
printf "%-8s %12s %12s %12s %12s %12s\n" "------" "---------" "--------" "--------" "-------" "-------"
 
df -B1 | awk '
NR>1 && $1 ~ /^\/dev\// {
    if ($1 ~ /tmpfs|devtmpfs|overlay/) next
 
    split($6, parts, "/")
    drive = parts[length(parts)]
    if (drive == "") drive = "/"
 
    total = $2; used = $3; free = $4
    total_gb = total / 1073741824
    used_gb = used / 1073741824
    free_gb = free / 1073741824
    used_percent = (used / total) * 100
    free_percent = (free / total) * 100
 
    printf "%-8s %12.2f %12.2f %12.2f %12.2f %12.2f\n",
           drive, total_gb, used_gb, free_gb, used_percent, free_percent
}' | sort