CSC220 Homework 1 2010

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Problem #1

Write a script that lists all the users on grendel by year of last access to their account. The output should list all the years starting in 2005 and ending in 2010.

An example of the output could be

2005:

2006:

drwx------   4 root     root     16384 Jul 11  2006 lost+found/           (not really a user but that is ok)
drwxr-xr-x   3 flatland users     4096 Jul 11  2006 flatland/
drwxr-xr-x   7 bmikic   faculty   4096 Jul 11  2006 bmikic/
drwxr-xr-x  23   102155 users     4096 Aug  3  2006 mmartin2/

2007:

drwxr-xr-x   3 root     root      4096 Apr 18  2007 keterhome/
drwxr-xr-x 155 cleung   users    12288 May 18  2007 snida/
drwxr-xr-x  43 zeno     users    20480 Aug 14  2007 zeno/

etc...

• store your script in a file called allUsersByDate.sh and submit it as follows:

   submit hw1 allUsersByDate.sh

(For those of you who have never used our class system before, you need to be logged in your 220a-xx account to submit your programs. They get copied to the instructor's directory automatically, and time-stamped. You can submit a program as many times as you want, but be aware that each submission overwrites the previous contents of a file.)

Problem #2

• Same as Problem #1, but this time the output should be just the user's name, not the whole line showing the permissions, date, etc.

• Your output should not include the lost+found, which is not a user but just a regular directory.

Example:

2006:

flatland/
bmikic/
mmartin2/

• Store your script in a file called allUsersByDate2.sh and submit it as follows:

submit hw1 allUsersByDate2.sh

Problem #3

• Write a script that contains all the answers to the questions in Lab #1.
• Make your script output (echo) the name of the section and the question before each output. For example

Path-Related Questions: Question 1
 
/Users/classes/220a/

Path-Related Questions: Question 2

100e  102b  103a  105b  107a  111b  220a  240a  352b  400b      archive_old_accts.pl  testd3
102a  102c  105a  105c  111a  111c  231a  249b  353a  acctlist  OLD

Warning! When I execute your script, I will not be in your home directory, but in a different directory, somewhere in /Users/classes/220a/handin/... Therefore, make sure that you test your script by running it from a directory other than your main directory. For example, you can create a new directory in your account, copy your script there, cd to the directory, and run the script from there.