Week 10 Exercise – GREP and Regular Expressions
Value:
5 marks, marked out of 5
Due: End of Class, Week 10
Obtain the file grepdata.txt. , then upload it to your home directory
Once you have the file, write a series of grep
statements that do the following. Save the statements as a script
named in the folllowing form:\
lastname_firstname_grep1.sh
and upload it into SLATE.
- Print all lines that contain a phone number with an extension (the letter x or X followed by four digits).
-
Print all lines
that begin with three digits followed by a blank. Your answer must
use the
\and\repetition specifier. - Print all lines that contain a date. Hint: this is a very simple pattern. It does not have to work for any year before 2000.
-
Print all lines
containing a vowel (a, e, i, o, or u) followed by a single character
followed by the same vowel again. Thus, it will find “eve” or
“adam” but not “vera”. Hint:
\(and\) - Print all lines that do not begin with a capital S.
Write grep statements
that use command-line options along with the pattern to do the
following:
- Print all lines that contain CA in either uppercase or lowercase.
-
Print all lines
that contain an email address (they have an
@in them), preceded by the line number. -
Print all lines
that do not contain the word
Sep.(including the period). - Print all lines that contain the word de as a whole word.
Your patterns should work in any generic file of this sort. They should not be dependent upon the data in this particular file; if I add more lines of the same form to the file, your patterns should still work.