Linux Disk Cleanup Script

#!/bin/bash

# This resource is provided as a convenience for Level users. We cannot 
# guarantee it will work in all environments. Please test before deploying 
# to your production environment. We welcome contributions to our community 
# library

# Level Library
# https://level.io/library/script-linux-disk-cleanup

# Create log file
LOG_FILE="/var/log/cleanup_$(date +%Y%m%d_%H%M).log"
TOTAL_SAVED=0

# Ensure running as root
if [ "$EUID" -ne 0 ]; then z
    echo "Please run as root"
    exit 1
fi

log_message() {
    echo "$1" | tee -a "$LOG_FILE"
}

get_size() {
    if [[ -e $1 ]]; then
        du -sk "$1" 2>/dev/null | cut -f1
    else
        echo "0"
    fi
}

delete_safely() {
    local path="$1"
    local desc="$2"
    
    if [[ -e "$path" ]]; then
        local size_before=$(get_size "$path")
        rm -rf "$path" 2>/dev/null
        local freed=$((size_before))
        TOTAL_SAVED=$((TOTAL_SAVED + freed))
        log_message "Cleaned $desc - Freed $((freed/1024)) MB"
    fi
}

log_message "Server cleanup started at $(date)"
log_message "Hostname: $(hostname)"
log_message "Kernel: $(uname -r)"

# Clean various system temp directories
TEMP_PATHS=(
    "/tmp"
    "/var/tmp"
    "/var/cache/apt/archives"  # For Debian/Ubuntu
    "/var/cache/yum"          # For RHEL/CentOS
    "/var/cache/dnf"          # For Fedora
    "/var/log"
)

# Clean each temp location
for path in "${TEMP_PATHS[@]}"; do
    if [[ -d "$path" ]]; then
        log_message "\nCleaning $path..."
        
        # Special handling for package manager caches
        if [[ "$path" == "/var/cache/apt/archives" ]]; then
            apt-get clean 2>/dev/null
            continue
        elif [[ "$path" == "/var/cache/yum" ]]; then
            yum clean all 2>/dev/null
            continue
        elif [[ "$path" == "/var/cache/dnf" ]]; then
            dnf clean all 2>/dev/null
            continue
        fi
        
        # For /var/log, keep recent logs
        if [[ "$path" == "/var/log" ]]; then
            find "$path" -type f -name "*.gz" -mtime +30 -delete 2>/dev/null
            find "$path" -type f -name "*.old" -mtime +30 -delete 2>/dev/null
            find "$path" -type f -name "*.log.*" -mtime +30 -delete 2>/dev/null
            continue
        fi
        
        # For other directories, remove files older than 7 days
        find "$path" -type f -mtime +7 -print0 2>/dev/null | while IFS= read -r -d '' file; do
            # Skip if file is in use
            if lsof "$file" >/dev/null 2>&1; then
                continue
            fi
            delete_safely "$file" "temp file: $(basename "$file")"
        done
    fi
done

# Clean journald logs (if systemd is present)
if command -v journalctl >/dev/null 2>&1; then
    log_message "\nCleaning journald logs..."
    journalctl --vacuum-time=30d >/dev/null 2>&1
fi

# Clean old Docker containers and images (if Docker is installed)
if command -v docker >/dev/null 2>&1; then
    log_message "\nCleaning Docker..."
    docker system prune -af --volumes >/dev/null 2>&1
fi

# Clean old Kubernetes logs (if kubectl is present)
if command -v kubectl >/dev/null 2>&1; then
    log_message "\nCleaning Kubernetes logs..."
    find /var/log/containers -type f -mtime +30 -delete 2>/dev/null
    find /var/log/pods -type f -mtime +30 -delete 2>/dev/null
fi

# Final summary
TOTAL_GB=$(echo "scale=2; $TOTAL_SAVED/1024/1024" | bc)
log_message "\nCleanup completed at $(date)"
log_message "Total space saved: ${TOTAL_GB} GB"
log_message "Log file saved to: $LOG_FILE"

# Report disk usage after cleanup
log_message "\nCurrent disk usage:"
df -h | tee -a "$LOG_FILE"