1. GLIBC (libc-x.x.x.so) contains the standard C library functions such as printf() and many others that most application programs depend on. 2. The Linux dynamic loader (ld-x.x.x.so) is responsible for loading the binary executable into memory and performing the dynamic linking required by the application’s reference to shared library functions.
The best systems administrators are set apart by their efficiency. And if an efficient systems administrator can do a task in 10 minutes that would take another mortal two hours to complete, then the efficient systems administrator should be rewarded (paid more) because the company is saving time, and time is money, right? The trick is to prove your efficiency to management.