How to Check if the Firewall Is Active on Linux (Across Different Distributions)
On Linux systems the active firewall service depends on the distribution. On Ubuntu or Debian you often check with ufw…
Legacy Linux VMs and the udev NIC Trap: Why VMware Clones and OVF Exports Lose Networking
Whether you clone a legacy Linux VM (e.g. SLES11) in vSphere or export it as an OVF template and redeploy,…
Step-by-Step Guide Part 6: How to build your own NetApp ONTAP 9 LAB – NFSv4 Pitfalls
When you switch from NFSv3 to NFSv4, things definitely change under the hood, and suddenly your permissions or ownership mappings…
Step-by-Step Guide Part 5: How to build your own NetApp ONTAP 9 LAB – Root Squashing
If you’ve ever tried as root to chown, chmod, or just create a file on an NFS-mounted share and were…
Cheat Sheet – User Management Commands in Linux
In the world of Linux and Unix-based systems, user roles and permissions are the foundation of security and system integrity. In this post…
Mastering GCP Virtual Machines – Part 2 (Connect to Linux VMs)
In Part 1 we saw how to create a new virtual machine instance (Linux Ubuntu), checking if the google guest…
Mastering GCP Virtual Machines – Part 1
Even with all the fancy managed services, plain old virtual machines are still the backbone of a lot of real-world…
Set up a Central Log Server with syslog-ng daemon on SUSE Linux Enterprise Server
Centralized logging is essential for monitoring, troubleshooting, and securing enterprise systems. On SUSE Linux Enterprise Server (SLES), the syslog-ng daemon…
resize2fs Superblock Checksum Error – What It Means and How to Fix It
After extending a logical volume (e.g., using LVM), it’s common to resize the filesystem to make use of the newly…
How to install Azure CLI on Linux
To install Azure CLI on SUSE/OpenSUSE, choose one of the following methods: For other distributions you will find in the…
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