Following Linux commands can be used to add words to file.
1) open file in Linux vi editor
2) ESC and type following command as you referred
:/s/^/0/g
add zero(0) to in front of each line
^ defines the start of the line
:/s/$/0/g
add zero(0) to end of each line
$ defines the end of the line
:/s/718/0/g
replace "718" with zero(0)
