Automated System Maintenance

#!/bin/bash

LOGFILE="/var/log/last-7days-maintenance.log"

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

# 2. Logging
exec > >(tee -a $LOGFILE) 2>&1

# 3. Detect OS and cleanup packages
if grep -qi "ubuntu" /etc/os-release; then
    echo "Ubuntu detected - cleaning packages"
    apt update -y
    apt autoremove --purge -y
    apt autoclean -y
    apt clean
elif grep -qiE "rhel|centos|rocky|alma" /etc/os-release; then
    echo "RHEL-based OS detected - cleaning packages"
    yum update -y
    yum autoremove -y
    yum clean all
fi

# 4. Clear memory cache safely
echo "Clearing RAM cache"
sync
echo 3 > /proc/sys/vm/drop_caches

# 5. Clean old temp files (older than 7 days)
echo "Cleaning temp files older than 7 days"
find /tmp -type f -mtime +7 -delete
find /var/tmp -type f -mtime +7 -delete

# 6. Vacuum journal logs
echo "Cleaning journal logs older than 7 days"
journalctl --vacuum-time=7d

# 7. Restart systemd daemon safely
echo "Reloading systemd daemon"
systemctl daemon-reexec

# 8. Store last 7 days error logs
echo "Saving error logs"
journalctl -p err --since "7 days ago" --no-pager > /var/log/last-7days-errors.log

# 9. Docker cleanup
if command -v docker &> /dev/null; then
    echo "Cleaning Docker resources older than 30 days"
    docker container prune --filter "until=720h" -f
    docker image prune -a --filter "until=720h" -f
    docker network prune --filter "until=720h" -f
    docker volume prune -f
    docker builder prune --filter "until=720h" -f
else
    echo "Docker not installed, skipping"
fi