Basic Perl Scripting
Exercise 1
To be handed in: Thursday 11th of October


In this exercise we give an example of analyzing the contents of a
directory. The following example will be explained during the lecture:

We want to analyze the contents of the directory /tmp containing these files: 

-rw------- 1 rongzhen rongzhen    1679 Oct  1 11:20 krb5cc_529
-rw------- 1 bab      bab         1317 Oct  1 14:19 krb5cc_558
-rw------- 1 yasve    yasve       2899 Oct  1 20:51 krb5cc_532
-rw------- 1 shlchen  shlchen     1281 Oct  2 03:20 krb5cc_517
-rw------- 1 elias    elias       3961 Oct  2 06:47 krb5cc_569
-rw------- 1 linna    linna       1215 Oct  2 10:34 krb5cc_550

Using the following script we obtain all files belonging to user elias:
 
ls -l /tmp| perl -n -e '@a=split;print if $a[2] eq "elias";'

Output:
-rw------- 1 elias    elias       3961 Oct  2 06:47 krb5cc_569


Your Exercise: 

Take a given directory on your computer and write a similar script as
above that will print all files that were modified on the first day of
any month (i.e. 1st of Jan, 1st of Feb etc). Hand in the following:
the contents of the directory (ls -ltr), the script, and the output of
the script.