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Ch 2 History of the UNIX OS
UNIX The Textbook 2nd edition
10
Computer Science
Undergraduate 2
09/29/2014

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Term
If a file to which a soft link exists is deleted, what happens?
Definition
The soft link points to a non-existent file.
Term
The command: wc can be used to:
Definition
display the number of characters, lines or words in a file
Term
a ____ _____ is a pointer to an inode
Definition
hard link
Term
what system was the immediate predecessor of UNIX?
Definition
MULTICS developed by Bell Laboratories
Term
Where was Unix initially developed and by whom?
Definition
Bell Labs, Ken Thompson, Dennis Ritchie and others
Term
What are the three main branches of UNIX development?
Definition
1. USG, USDL, USL
2. Bell Labs
3. BSD
Term
what was the commercial branch and was the academic branch?
Definition
AT & T branch, BSD branch (Berkeley Software Distribution)
Term
characteristics of UNIX during its early development
Definition
originally written in a low-level programming language called assembly, the operating system was re-coded in the early 1970 in a the high-level programming language, C.
Term
why is UNIX an open software system?
Definition
the source code is freely distributed among the community of users-its evolution has been shaped to some extent by popular mindset
Term
who initially developed the LINUX system?
Definition
Linus Torvalds
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