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#!/bin/bash
# System info reporter - outputs JSON with verifiable data
set -euo pipefail
# Get hostname
HOSTNAME=$(hostname 2>/dev/null || echo "unknown")
# Get kernel version
KERNEL=$(uname -r 2>/dev/null || echo "unknown")
# Get OS info (try multiple methods)
if [[ -f /etc/os-release ]]; then
OS_NAME=$(grep '^NAME=' /etc/os-release 2>/dev/null | cut -d'=' -f2 | tr -d '"' || echo "unknown")
OS_VERSION=$(grep '^VERSION=' /etc/os-release 2>/dev/null | cut -d'=' -f2 | tr -d '"' || echo "unknown")
else
OS_NAME="unknown"
OS_VERSION="unknown"
fi
# Get disk usage for root filesystem
DISK_TOTAL=$(df -h / 2>/dev/null | awk 'NR==2 {print $2}' || echo "0")
DISK_USED=$(df -h / 2>/dev/null | awk 'NR==2 {print $3}' || echo "0")
DISK_AVAIL=$(df -h / 2>/dev/null | awk 'NR==2 {print $4}' || echo "0")
DISK_PERCENT=$(df -h / 2>/dev/null | awk 'NR==2 {print $5}' | tr -d '%' || echo "0")
# Get memory info
if [[ -f /proc/meminfo ]]; then
MEM_TOTAL_KB=$(awk '/MemTotal/ {print $2}' /proc/meminfo 2>/dev/null || echo "0")
MEM_FREE_KB=$(awk '/MemFree/ {print $2}' /proc/meminfo 2>/dev/null || echo "0")
MEM_TOTAL_GB=$(echo "scale=2; $MEM_TOTAL_KB/1048576" | bc 2>/dev/null || echo "0")
else
MEM_TOTAL_GB=0
fi
# Get current user
CURRENT_USER=$(whoami 2>/dev/null || echo "unknown")
# Get current working directory
CWD=$(pwd 2>/dev/null || echo "unknown")
# Count processes
PROCESS_COUNT=$(ps aux 2>/dev/null | wc -l || echo "0")
# Output JSON
cat <<EOF
{
"hostname": "$HOSTNAME",
"kernel": "$KERNEL",
"os": {
"name": "$OS_NAME",
"version": "$OS_VERSION"
},
"disk": {
"total": "$DISK_TOTAL",
"used": "$DISK_USED",
"available": "$DISK_AVAIL",
"percent_used": $DISK_PERCENT
},
"memory": {
"total_gb": $MEM_TOTAL_GB
},
"user": "$CURRENT_USER",
"working_directory": "$CWD",
"process_count": $PROCESS_COUNT
}
EOF