Managed Shared libraries

Question 1

What is a shared library

Answer 1

Files containing functionality that other apps can use

Files end in a .so extension for shared object

Question 2

Where can you find a shared library in linux

Answer 2

/lib
/usr/lib (for 32bit systems and /usr/lib64 (for 64bit systems
/usr/local/lib
/usr/share

Question 3

What types of library files are there

Answer 3

Dynamic (ends in .so)
Statically linked (ends in .a)

Question 4

What does the command ldd do

Answer 4

Prints out shared object (library) dependencies

Question 5

What does the command ldconfig do

Answer 5

Configures dynamic linker run-time bindings, creates a cache based on library directories and can show you what is currently cached

Question 6

What is stored inside this file /etc/ld/so/config

Answer 6

Config file that points to directories and other config files that hold references to library directory locations

Question 7

What is the LD-LIBRARY_PATH

Answer 7

Legacy envir. variable that points to a path where library files can be read from