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Disk guides
Hands-on guides that cover Disk. Every command is run and verified on a live server before it is published.
GuideDisks and Partitions
Map the linux disks on an Ubuntu 24.04 server: run lsblk to list the disk and its partitions, then df to see how much space is left.
GuideAsking Questions with PromQL
PromQL turns raw metrics into answers: memory used, disk full, CPU busy. Learn the rate() and aggregation queries you will reach for constantly.
GuideDisk Usage: df and du
Master linux disk usage with df and du on Ubuntu 24.04: df shows free space per filesystem, du shows what fills a directory so you find the culprit.
GuideDisk IO: iostat, iotop and the Culprit
Read disk IO on Ubuntu 24.04 with iostat: utilisation, await and throughput, then find the process with iotop and pidstat and split latency from throughput.