Linux
Linux configuration and troubleshooting.
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Build a Local Package Repository for Rocky Linux 9 and Ubuntu 24.04 or 26.04
Prepare RPM and APT repositories, publish their metadata and signatures, and verify package sources from the client system.
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Use cloud-init to Configure a VM on First Boot
Read cloud-init’s data sources and stages, prepare first-boot configuration and inspect the logs before repeating or repairing a run.
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Start with Ansible: SSH Access and a First Playbook
Prepare SSH access and an inventory, test connectivity and run a first Ansible playbook with the required privileges.
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Run Ollama Models on Linux: Installation, Service and Local API
Install Ollama on Linux, check the server and model state, and call the local API with the intended model.
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Expand a Linux Root Partition Without LVM: growpart and resize2fs
Check the disk and filesystem layout, grow a non-LVM root partition and expand its filesystem with the matching tool.
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Expand a Linux Root Filesystem with LVM, XFS or ext4
Trace the virtual disk, partition, physical volume, logical volume and filesystem before expanding an LVM-based Linux root.
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Use systemd: Create, Edit and Remove Services and Read journalctl Logs
Write and inspect systemd service units, apply changes, read logs and remove a custom service without losing unrelated configuration.
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Configure Ubuntu 26.04 Networking: Static IP, nmtui and Two NICs
Choose the active network manager, configure a static address and handle routing and DNS when Ubuntu 26.04 has two interfaces.
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Set a Static IP on Ubuntu 24.04 with Netplan, DNS and SSH Recovery
Inspect Netplan files and the active renderer, set an address and DNS, and test the change with a recovery path available.