Comparing Files and Searching Files

Question 1

diff

Answer 1

compare 2 files for the difference between them

diff filename filename

Question 2

sdiff

Answer 2

side by side comparison

Question 3

vimdiff

Answer 3

highlights the differences in vim

Question 4

grep

Answer 4

used to search for a pattern in a file

eg: grep dog myText.txt

Question 5

grep -i

Answer 5

performs a search ignoring case

Question 6

grep -c

Answer 6

counts the number of times the pattern occurs in the file

Question 7

grep -n

Answer 7

proceed output with line number

Question 8

grep -v

Answer 8

invert match. print lines that don’t match the pattern

Question 9

file

Answer 9

tells you what’s in a file

Question 10

|

Answer 10

Takes the standard output from one command and passes it in as standard input to the next command

command 1 | command 2

Question 11

cut

Answer 11

used to cut a piece of a file out

Question 12

cut -f N

Answer 12

specify which line number to display

Question 13

cut -d delimeter

Answer 13

used to cut with a delimeter

Question 14

grep bob /etc/password | cut -d: -ft,5 | sort | tr “:” “ “ | column -t

Answer 14

search for bob in the file password, then cut out only the first and 5 sections of the file separated by colons, then sort them alphabetically, then remove the colon and replace with whitespace, then format as a table