Quoting and special characters

Question 1

””

Answer 1

Double quotation marks (quotes) denote strings but let shell constructs be evaluated, e.g. variables.

Question 2

’’

Answer 2

Singe quotation marks (quotes) denote strings literally.

Question 3

``

Answer 3

Grave accent, backquote or backtick cause their contents to be evaluated as a shell command, e.g.
$ echo My name is whoami

Question 4

Escape character

Answer 4

\

Question 5

Wildcard

Answer 5

• (limited to filenames)

Question 6

Comments

Answer 6

#

Question 7

Any character in a set

Answer 7

[aSetOfCharachters]

Question 8

Any of the capital letters

Answer 8

[A-Z]

Question 9

Any single character not in a set

Answer 9

[^set] or [!set]

Question 10

Any single character

Answer 10

?

Question 11

Brace expansion

Answer 11

e.g. echo sand{X,YY,ZZZ}wich