Managing Shared Libraries

Question 1

system library

Answer 1

collection of items, such as program functions

Question 2

functions

Answer 2

self-contained code modules that perform a specific task within an applications

Question 3

what are the two types of libraries that linux supports

Answer 3

static and dynamic

Question 4

static libraries

Answer 4

copied into an application when it is compiled

Question 5

dynamic libraries

Answer 5

library functions are copied into memory and bound to the application when the program is launched

Question 6

what is the library naming convention

Answer 6

libLIBRARYNAME.so.VERSION

Question 7

When a program is using a shared function, the system will search for the function’s library file in what specific order?

Answer 7

1. LD_LIBRARY_PATH environmental variable; 2. Program’s PATH environmental variable; 3. /etc/ld.so.conf.d/ folder; 4. /etc/ld.so.conf file; 5. /lib/ and /user/lib/ folders

Question 8

dynamic link loader

Answer 8

responsible for finding the program’s needed library functions

Question 9

library cache

Answer 9

catalog of library directories and all the various libraries contained within them

Question 10

ldconfig

Answer 10

library cache file

Question 11

ldd

Answer 11

tracks down missing library files for an application