UNIX for Dummies Questions & Answers

how to add value/word at the beginning of each line in a file ?

i have file number.txt and the output is below

1000
1001
1002
1003
1004

i want to add 000 at the beginning of each line, desire output is below
0001000
0001001
0001002
0001003
0001004
and so on

please advise how to do it, i been searching forum but with no luck

---------- Post updated at 10:40 PM ---------- Previous update was at 10:33 PM ----------

i have tried command seq -f "%010g" first number last number
but seq can only format number until 6 digit long, it wont print output 0000100001 0000100002 instead it become 0000.5.+.09 something

Will this work for you?

Code:

awk ' { print "000" $0; } ' number.txt

Use awk:

Code:

awk '{printf("%015d\n",$1)}' number.txt

Have a look at :
https://www.unix.com/unix-dummies-que...es-column.html
Regards

Through Sed..

Code:

sed 's/^/000/' inputfile

WOOHOO.. Thanks GUYS. This code works just fine. I really appreciate all your help