A program fails to start with an error about a missing shared object. Type the command that prints the shared libraries the binary /usr/bin/ssh depends on, and shows which file each one currently resolves to.
LPIC-1 Exam 101-500, objective 102. Linux installation and package management easy
Machine-checked — no person has signed for it. This question was read against the source cited below by an automated pass, which found no contradiction. That is a weaker claim than it sounds: the same kind of process wrote the question, so it can confirm its own mistake.
Treat it as a good draft rather than as settled fact, and read the source below before you rely on it. It is not used in mock exams here — only questions a person has signed for are.
How these questions are written — where each question comes from, what the verification ledger records, and what happens when one is found wrong.
Answer
Type the answer.
Accepted answers
ldd /usr/bin/ssh/usr/bin/ldd /usr/bin/ssh
Case sensitive — Linux is, and grading LS as ls would teach a falsehood.
Why
ldd lists a binary's dynamic dependencies and the path each soname resolves to right now, printing 'not found' for the ones the dynamic linker cannot locate — which is exactly how you identify a missing library. Do not confuse it with ldconfig, which rebuilds the linker's cache. Note that ldd works by asking the dynamic linker to resolve the object, so running it on an untrusted binary is not a safe inspection technique.
Where this comes from
- Cited
- LPI exam objective 102.3
- What it says
- Identify the shared libraries a given program depends on.
Practise this
Reading one question is not practice. The trainer will draw a short set from objective 102 and space the ones you get wrong.
More questions on this objective
- A mail server keeps filling its root filesystem because spooled mail and logs grow without bound, and when the disk fills the whole system becomes unusable. Which single change to the disk layout most directly contains that failure? machine-checked
- In LVM terminology, which object is created directly on a partition or whole disk so that its storage can be added to a pool? machine-checked
- You are laying out storage for a general-purpose Linux server. Which TWO of the following are genuine reasons to use LVM for the data filesystems rather than plain partitions? machine-checked
- Which file is the configuration file that GRUB 2 generates, and which administrators are told not to edit by hand on a typical Linux distribution? machine-checked
- You replaced the boot disk in a BIOS/MBR system and need to write the GRUB 2 boot loader into the master boot record of /dev/sda, installing the required GRUB modules under /boot. Which command does that? machine-checked
- On a GRUB 2 system whose configuration file is /boot/grub/grub.cfg, type the grub-mkconfig command — including the option and its argument — that regenerates that file. machine-checked