I have around 150 files with 4 columns each but variable row lengths that I need to combine by column. I do not have any common column. I want to use "paste " command in unix to do it but before that I have to get all my files to be of equal length. 
Below are examples of my input files:
01-16A1-325     01-16A1-325     01-16A1-325     01-16A1-325
01-16A1-325     01-16A1-325     01-16A1-325     01-16A1-325
A     T     G     C
11     47     0     1
11     47     0     0
11     48     0     0
12     50     0     0
12     53     0     0
13     56     0     0
13     60     0     0
13     62     0     0
13     63     0     0
13     64     0     0
13     66     0     0
14     68     0     0
14     70     0     0
14     72     0     0
=====================================
01-17B7-325     01-17B7-325     01-17B7-325     01-17B7-325
01-17B7-325     01-17B7-325     01-17B7-325     01-17B7-325
A     T     G     C
52     57     56     9
53     59     58     9
54     62     62     10
57     67     69     10
61     73     80     10
68     81     95     11
74     87     112     11
81     92     127     11
86     95     141     11
92     99     157     11
98     105     178     12
104     112     205     12
110     119     237     13
116     126     271     13
121     131     307     12
126     136     346     11
133     142     389     11
141     151     439     10
151     162     494     10
161     177     556     11
171     196     622     11

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Would appreciate any help. Thanks Biobee

In reply to filling up rows in files to make them of equal length by biobee07

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