Print hey 48 times on screen
yes | head -48 | awk '{print "hey"}'
Print hey.0010 to hey.0099
yes | head -90 | awk '{printf("hey00%2.0f ",NR+9)}'
Head= how many to count
NR= where to start counting from
Print Hello to hello3
yes | head -3 | awk '{printf("hello%.of ", NR+0)}'
Print everyline erasing the 2nd field.
awk '{$2=" ",print}' filename