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CORK INSTITUTE OF TECHNOLOGY
INSTITIÚID TEICNEOLAÍOCHTA CHORCAÍ
Semester 1 Examinations 2011/
Module Title: Systems Administration 2
Module Code: COMP 7021
School: Mathematics & Computing
Programme Title: Bachelor of Science in Computing in IT Support – Award Bachelor of Science in Computing in IT Support – Award (ACCS)
Programme Code: KITSU_7_Y KITSE_7_Y
External Examiner(s): Ms. A. Meagher Internal Examiner(s): Mr. G. McSweeney
Instructions: Answer 4 questions. All questions are worth equal marks.
Duration: 2 Hours
Sitting: Winter 2011/
Requirements for this examination:
Note to Candidates: Please check the Programme Title and the Module Title to ensure that you have received the correct examination. If in doubt please contact an Invigilator.
Systems Administration 2
Semester 1 2011 - 2012
Time: 2 Hours Answer 4 questions. All questions are worth equal marks.
COMP
ITS 3 KITSE_7_Y
(a) The output for the ls – ls command has the following format.
6 -rw-r--r-- 1 bill staff 2813 Oct 5 10:17 newFile
Assuming that each block is 1024 bytes in size; write an awk program to calculate the total internal fragmentation in the current directory. ( 9 Marks )
(b) If every user’s default shell is ‘sh’ describe how sed might be used to change all users default shell to BASH. ( 4 Marks )
(c) A user downloads the following java jdk file jdk- 7 - linux-i586.tar.gz to his desktop. How might he install this on his system so he can run java programs? ( 4 Marks )
(d) Apart from the example in (c) above; name two other types of file a user might download when installing a package (such as java jdk) in a Linux environment. ( 2 Marks )
(e) How might an administrator limit access to a resource (e.g. a database) in a Linux environment? ( 3 Marks )
(f) Give an example when a symbolic (soft) link might be useful. ( 1 Mark )
(g) Name two advantages of using open source software. ( 2 Marks )
(a) The at and cron programs are examples of Linux daemons. What is a daemon? ( 2 Marks )
(b) How might an administrator check (from a command line interface) whether at is running? ( 2 Marks )
(c) Describe the cron program. ( 6 Marks )
(d) Describe the main features of the NFS (Network File Service). ( 4 Marks )
(e) How might an administrator:
(i) Stop a service when the operating system is running? (i) Prevent a service from starting at boot time? ( 4 Marks )
(f) What is the purpose of LAMP? ( 2 Marks )
(g) What do the letters LAMP stand for? ( 2 Marks )
(h) Name the standard protocol for remote login and name the protocol it replaced. ( 3 Marks )
(a) What is the purpose of the dispatcher program? ( 2 Marks )
(b) Why might a process be blocked? ( 2 Marks )
(c) Distinguish between long term, medium term and short term process scheduling. ( 3 Marks )
(d) Describe the multi-level feedback algorithm. ( 4 Marks )
(e) Apart from multi-level feedback, name one pre-emptive and one non pre-emptive scheduling algorithm. ( 2 Marks )
(f) Suggest three ways an administrator might deal with disk space shortage. ( 3 Marks )
(g) How might an administrator assign quotas (in Linux) for users’ home directories? ( 7 Marks )
(h) What is the command to generate a report on quotas? ( 2 Marks )
