Grep

Question 1

Q: What is the most common command used to search for information using regular expressions in Linux?

Answer 1

A: grep (short for global regular expression print)

Question 2

Q: What does the grep command do?

Answer 2

Searches files for patterns of characters using regular expression metacharacters. The command name is short for “global regular expression print.”

Question 3

Q: What command is used to search using extended regular expressions?

Answer 3

A: egrep or grep -E

Question 4

Q: What command is used to search without interpreting regular expressions for faster results?

Answer 4

A: fgrep or grep -F

Question 5

what does the egrep command do?

Answer 5

A variant of the grep command used to search files for patterns, using extended regular expressions.

Question 6

what dose the fgrep command do?

Answer 6

A variant of the grep command that does not allow the use of regular expressions.

Question 7

what does the -i option for for grep?

Answer 7

makes it case insensitive

Question 8

how do search ONLY for a speicife word and no other words?

Answer 8

“(chr space) word (chrspace)”

Question 9

what does the dot reprsent in the following? grep “t.e”
project 4

Answer 9

any character AND what the command is doing is search for any line that has a word that starts with t and ends in e with any char inbetween in project4

Question 10

how do you view lines that start with a spefic word or char give the command?

Answer 10

grep “^ (word or phase) “