Regular Expressions

Question 1

Character that denotes matching the start of a line

Answer 1

For example: grep -E “^[A-N]” filename.txt
Will match lines that start with any uppercase letter in the range A-N in the filename.txt file

Question 2

Character that denotes matching the end of a line

Answer 2

$
For example: grep -E “[A-N]$” filename.txt
Will match lines that end with any uppercase letter in the range A-N in the filename.txt file

Question 3

Match a range of characters

Answer 3

[A-Z]

Question 4

Match a specific set of characters

Answer 4

[ABCDE]

Question 5

Match excluding characters

Answer 5

[^A-M]

The ^ within the brackets is used as a NOT operator instead of the start of line operator