Problem

1. Devise wild-card patterns to match all filenames comprising at least three characters

(i) where the first character is numeric and the last character is not alphabetic,

(ii) not beginning with a dot,

(iii) containing 2004 as an embedded string except at the beginning or end.

2. Explain what these wild-card patterns match:

(i) [A-z]????*,

(ii) *[0-9]*,

(iii) *[!0-9],

(iv) *.[!s][!h].

3. A directory bar contains a number of files, including one named -foo. How do you remove the file?