AWK Variables

Question 1

provide an example using awk to search a file for the symbol #

Answer 1

cat [FILE] | awk /#/
Check’s [FILE] for any lines using the ‘#’

Question 2

If the field separator is not a space or a tab than how would you define it for “:” ?

Answer 2

awk -F’,’ ‘{print NF}’ /home/file.csv

Question 3

AWK Variables:
$0

Answer 3

used to call/print the
full output (line)

Question 4

AWK Variables:
$1, $2, $3 … $NF

Answer 4

used to call/print the
First, second, third, and last field

Question 5

AWK Variables:
NF

Answer 5

Number of Fields

Question 6

AWK Variables:
NR

Answer 6

Number of Records (rows)

Question 7

AWK Variables:
OFS

Answer 7

Output Field Separator (default: [::Space::] )

Question 8

AWK Variables:
FS

Answer 8

Field Separator for input (default: [::Space::] )

Question 9

AWK Variables:
ORS

Answer 9

Output Record Separator (default: “\n”)

Question 10

AWK Variables:
RS

Answer 10

Record Separator for input (default: “\n”)

Question 11

AWK Variables:
FILENAME

Answer 11

The name of the file