Process text streams using filters

Question 1

What command will combine two or more text files into a single file?

Answer 1

cat - concatenate (eg cat first.txt second.txt > combined.txt)

Question 2

What command joins two files by matching the contents of specified fields?

Answer 2

join - note uses the first field to match on

Question 3

What command will merges files line by line?

Answer 3

paste

Question 4

What command will convert tabs into spaces?

Answer 4

expand

Question 5

What command can display non text files?

Answer 5

od

Question 6

What command would order a file?

Answer 6

sort

Question 7

Which command will break a file into smaller pieces?

Answer 7

split

Question 8

Which command will change individual characters?

Answer 8

tr - translate

Question 9

What command will convert spaces into tabs?

Answer 9

unexpand

Question 10

What command will remove duplicate lines in a file?

Answer 10

uniq

Question 11

What command will clean up paragraphs in a text file?

Answer 11

fmt - format

Question 12

What command will number lines in a file?

Answer 12

nl - numbering lines

Question 13

What command prepares a file for printing?

Answer 13

pr

Question 14

What command shows the first 10 lines of a file?

Answer 14

head

Question 15

What command shows the last 10 lines of a file?

Answer 15

tail

Question 16

What option will keep displaying new lines as they appear at the end of a file?

Answer 16

tail -f or –follow

Question 17

What is the upgraded version on more?

Answer 17

less

Question 18

What command is used to extract portions of a text file?

Answer 18

cut

Question 19

What command will count words in a file?

Answer 19

wc - word count