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Top Forums Shell Programming and Scripting please help (closed homework thread) Post 50790 by djeung on Sunday 2nd of May 2004 07:44:01 PM
Old 05-02-2004
please help

I have these questions for my unix class that I can't figure out because I missed a couple of days. They are for a quiz we took last week so by answering the questions you are not bettering my grade or doing my homework. I just want to understand was the answers. My teacher is really bad at explaining things.


1. Matcha line containing the assignment of a value to a legal shell variable in grep.

2. Match a word containing a repeating sequence of characters, with one or more characters in between, in grep, e.g., match "abcxyabc" or "xax", but not "abcd" or "aa".

3. Exchange the second and third words on a line with at least 4 words in sed, leaving the rest unchanged, e.g., "hi there joe kool" becomes "hi joe there kool", but "hi there joe" is unchanged.

4. Match lines containing one or more letters immediately followed by one or more digits in grep, e.g., match "abc123" or "a7" but not "az-12".

5. Match lines containing a repeating sequence of letters followed at any distance by one or more digits in grep, e.g., match "axax123" or "aaxyz7" but not "az12" in grep.
 

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QUIZ(6) 							   Games Manual 							   QUIZ(6)

NAME
quiz - test your knowledge SYNOPSIS
/usr/games/quiz [ -i file ] [ -t ] [ category1 category2 ] DESCRIPTION
Quiz gives associative knowledge tests on various subjects. It asks items chosen from category1 and expects answers from category2. If no categories are specified, quiz gives instructions and lists the available categories. Quiz tells a correct answer whenever you type a bare newline. At the end of input, upon interrupt, or when questions run out, quiz reports a score and terminates. The -t flag specifies `tutorial' mode, where missed questions are repeated later, and material is gradually introduced as you learn. The -i flag causes the named file to be substituted for the default index file. The lines of these files have the syntax: line = category newline | category `:' line category = alternate | category `|' alternate alternate = empty | alternate primary primary = character | `[' category `]' | option option = `{' category `}' The first category on each line of an index file names an information file. The remaining categories specify the order and contents of the data in each line of the information file. Information files have the same syntax. Backslash `' is used as with sh(1) to quote syntacti- cally significant characters or to insert transparent newlines into a line. When either a question or its answer is empty, quiz will refrain from asking it. FILES
/usr/games/quiz.k/* BUGS
The construct `a|ab' doesn't work in an information file. Use `a{b}'. QUIZ(6)
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