UNIX recruitment instructions

Raw Device Used
Know at least five grep Parameters
Know how to specify the priority of a process
Know the concept of user permissions and what is umask?
Know at least 10 Signal
Understand the concepts of big end and Small End
How is the memory managed by the operating system?
Know what xdr_long is.
More advanced:
Familiar with libsocket and direct programming
Familiar with IPC, such as shared memory and Message Queue
In addition to pthread's create and join operations, pthread_attr _*()
Familiar with the difference between stack and stack
Read the core without symbol