Most successful attacks don’t use clever new techniques. They use old, known vulnerabilities that already had a fix available. Patching isn’t glamorous, but it closes more doors than almost anything else. This guide explains Patch Tuesday and gives a simple monthly routine for Windows and Linux.
Four habits that make the difference
- Know every device you own. You can’t patch what you don’t know about. Keep an inventory of laptops, servers, firewalls, switches and printers.
- Patch on a schedule, not when someone remembers.
- Fix internet-facing systems first. Firewalls, VPNs, remote access tools and web servers are what attackers scan for. When a critical fix for these appears, act within days, not weeks.
- Check it actually worked. Confirm patches installed, and follow up on devices that failed or were offline.
And plan for systems that can no longer be patched: if the vendor has stopped issuing updates, the device needs an upgrade or replacement plan, not a workaround.
What is Patch Tuesday?
On the second Tuesday of every month, Microsoft releases security updates for Windows, Windows Server, Office and other products. Attackers study the same updates to work out what to target, so the gap between release and install matters.
A monthly routine for Windows
- Days 1–2: install on a few test PCs and check your key business apps.
- Within a week: roll out to everyone else.
- Servers: schedule a maintenance window, back up first, then update.
- Check: confirm every device installed the update. Intune or your management tool can show you.
- Don’t forget browsers, PDF readers and line-of-business apps.
Linux servers need patching too
- RHEL: dnf check-update to see what’s waiting, then dnf update, or security fixes only with dnf update –security.
- Ubuntu: apt update, then apt upgrade. unattended-upgrades can install security fixes automatically.
- Kernel fixes: kpatch on RHEL and Livepatch on Ubuntu Pro can apply critical kernel fixes without an immediate reboot.
- Maintenance window: agree a monthly slot for reboots, so they don’t wait forever.
- Test first on a less critical server, and take a fresh backup before major updates.
How Pentacle IT Solutions can help
Pentacle IT Solutions supports Windows Server and Linux servers for businesses in Lucknow and across Uttar Pradesh: upgrades, configuration, hardening and one-off or AMC support.
