Finding the libraries a program needs and the packages they came from, the three kinds of library name, and adding a directory to the linker's search path.

Before you start

The lab installs the SSH client if it's missing. Write answers to the files in /root/lab-answers/.

Tasks

Run ldd on /usr/bin/ls, /usr/bin/ssh and /usr/bin/bash. Pick one library from each and find which package installed it. Write one line per program to /root/lab-answers/1: the program, the library and the package, such as ls libselinux.so.1 libselinux.
Look at ls -l of libc.so* and libz.so* in your library directory and name each kind of name. Write zlib's soname on line 1 of /root/lab-answers/2, and its real name (the file the soname points to) on line 2.
Make an empty directory /opt/test/lib, add it to a file in /etc/ld.so.conf.d/, run ldconfig -v | grep /opt and see it scanned. Then remove the file and run ldconfig again. Check it yourself: ldconfig -v 2>/dev/null | grep /opt prints the directory while the file is there, and nothing after.

Hints

rpm -qf FILE on the RHEL family, dpkg -S FILE on Debian and Ubuntu. If dpkg -S finds nothing for a path under /lib, try it under /usr/lib (or the other way round).
The library directory is /usr/lib64 on the RHEL family and /usr/lib/x86_64-linux-gnu on Debian and Ubuntu; ldconfig -p | grep libz.
Real name libz.so.1.3, soname libz.so.1, linker name libz.so; readlink, objdump -p FILE | grep SONAME.