linuxexpert-practice-labs/labs/lpic-1/102-5-rpm-and-yum/README.md

LPIC-1 102.5: RPM, YUM and Zypper

Querying and verifying installed packages, looking inside a downloaded package, and undoing an install with the DNF history. (The chapter's Zypper task needs openSUSE, so it isn't part of this lab.)

Before you start

The lab adds a comment line to /etc/ssh/sshd_config (reset takes it out again), and notes where the DNF history stands. Write answers to the files in /root/lab-answers/.

Tasks

1. Find which package owns /etc/ssh/sshd_config, list its configuration files, then verify the package with rpm -V. Write the package name on line 1 of /root/lab-answers/1, and below it every file rpm -V reports as changed, one per line.
2. Download the tree package with dnf download into /root/rpms, query it with rpm -qpi and rpm -qpl, and extract one file, usr/bin/tree, with rpm2cpio and cpio, so that it ends up as /root/rpms/usr/bin/tree.
3. Use dnf provides to find the package for the dig command, which you don't have, and write its name to /root/lab-answers/3. Install it, then undo the install with dnf history undo last.

Hints

• rpm -qf, rpm -qc, rpm -V; the letters say what changed (5 the checksum, S the size, T the time), c marks a configuration file.
• dnf download --destdir, rpm -qpi, rpm -qpl; rpm2cpio FILE.rpm | cpio -idv ./usr/bin/tree, run inside /root/rpms.
• On RHEL 10 and its relatives, the first dnf provides downloads the repositories' file lists, which can take several minutes on a slow mirror. dnf history, dnf history info last.