LPIC-2 201-450 case studies
LPIC-2 201-450 · Put your knowledge to work in context.
LPIC-2 is the second certification in the Linux Professional Institute’s multi-level professional program. It is aimed at Linux professionals who administer small to medium-sized mixed networks and who want independent validation of advanced system-administration skills. The current version is 4.5, delivered as exams 201-450 and 202-450. Candidates must hold an active LPIC-1 certification and pass both exams to receive LPIC-2. The LPIC-2 201-450 case studies are 5 cases and about 3,131 words.
1PostgreSQL WAL growth on a 500 GB LVM volume
A PostgreSQL 15 primary runs on a RHEL 9 virtual machine. The database cluster, including pg wal and the archive directory, sits on one 500 GB XFS logical volume mounted at /var/lib/pgsql; the volume is 92% full (about 40 GB free).
665 words, about 3 min2Third-party HBA module refuses to load after kernel update
A Debian 12 server provides iSCSI storage to 40 hosts. An administrator installed the vendor's out-of-tree storage HBA module mynic via DKMS, then applied a routine kernel update from 6.1.0-18-amd64 to 6.1.0-21-amd64.
619 words, about 3 min3Cloned VM enters emergency mode after disk copy
An Ubuntu 22.04 server was cloned at the storage layer to create a disaster-recovery test VM. The clone boots into emergency mode.
636 words, about 3 min4XFS data volume fails to mount after power loss
A CentOS Stream 9 server has an 8 TB XFS filesystem on a hardware RAID6 volume, mounted at /data. The UPS failed during a firmware update, and the host lost power while a large rsync was writing.
604 words, about 3 min5RAID6 rebuild stalls on a 12-disk array
An Ubuntu 22.04 backup server uses a 12-disk mdadm RAID6 array of 8 TB SATA drives as the sole backing store for LVM thin pool vgbackup. One drive failed and the hot spare began rebuilding.
607 words, about 3 min