These are linux commands. Type cd /usr/share/dict . The file words is the Linux

Question

These are linux commands. Type cd /usr/share/dict. The file words is the Linux English dictionary. You will use egrep to explore this file. Your answers below will be the egrep command that solves the problem.

a.List all words that have the letter a followed immediately by the letter z.

b.List all words that have the letter a followed sometime later by the letter z (there must be at least one letter in between).

c.List all words that start with the letter a and end with the letter z.

d.List all five letter words that start with the letter a and end with the letter z.

e.List all words that start with two capital letters followed immediately by at least one lower case letter.

f.List all words with two consecutive a’s, i’s or u’s. Recall that | means “or”.

g.List all words that contain a q followed by a non-u (Iraqi should be listed, but queen should not).

h.List all entries in the file that contain at least one non-letter.

Explanation / Answer

Let me know if you have any doubts.

cd /usr/share/dict
a:
egrep s*az*s words

b:
egrep s*a+z*s words

c:
egrep ^a*z$ words

d:
egrep ^a...z$ words

e:
egrep ^[A-z][A-Z][a-z].*s words

f:
egrep s*(aa | ii | uu)*s words

g:

egrep s*q[^u]*s words

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