Append output of two files in shell?

Question

I have two files like this

file1

a
b
c

file2

0
1
2

I want to output

a,0
b,1
c,2

Appending the two files like this

row(n) of file1 +","+ row(n) file2
for every n, total n is same in both files

I want to know is there any utility in shell which can help me do this, I do not want to use java file read file write for this or any loops. Can it be done using awk?

Look at this question, it may have your answer. http://stackoverflow.com/questions/5467690/how-to-merge-two-files-using-awk — Ibrar Ahmed, Mar 16 '13 at 21:18

Chris Seymour · Accepted Answer · 2013-03-16T21:18:25.863

4

You want paste:

$ paste -d',' file1 file2
a,0
b,1
c,2

It can be done many ways in awk here is one:

$ awk 'FNR==NR{a[FNR]=$0;next}{print a[FNR]","$0}' file1 file2
a,0
b,1
c,2

edited Mar 16 '13 at 21:18

answered Mar 16 '13 at 21:12

Chris Seymour

79,902
29
153
193

Many thanks!! I just want to know if it can be done using awk? – Rohit Mar 16 '13 at 21:14
@JoeDimaggio yes it can be done in many ways with awk, see edit. – Chris Seymour Mar 16 '13 at 21:18

score 2 · Answer 2 · answered Mar 16 '13 at 21:38

2

Use the slightly overlooked tool pr:

$ pr -m -t -s,  file1 file2
a,0
b,1
c,2

answered Mar 16 '13 at 21:38

Fredrik Pihl

42,950
7
81
128

Append output of two files in shell?

2 Answers2