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Editorial Team
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Asked: 2026-05-31T01:08:08+00:00

I have two files which are in same order and they have the same

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I have two files which are in same order and they have the same number of rows:

file1(only 2 columns):

562_201 RIR1
562_202 RIR1
562_203 RIR1
562_204 RIR1
562_205 RIR1
562_206 RIR1
562_207 RIR1
562_208 RIR1
562_209 RIR1
562_210 WR1 
562_211 WR1 
562_212 WR1

file2 (I should say that file2 has more than million rows!):

562_201 0101
562_202 0101
562_203 0101
562_204 0101
562_205 0101
562_206 0101
562_207 0101
562_208 0101
562_209 0101
562_210 0101
562_211 0101
562_212 0101

and I want to merge them to get:

562_201 RIR1 0101
562_202 RIR1 0101
562_203 RIR1 0101
562_204 RIR1 0101
562_205 RIR1 0101
562_206 RIR1 0101
562_207 RIR1 0101
562_208 RIR1 0101
562_209 RIR1 0101
562_210 WR1  0101
562_211 WR1  0101
562_212 WR1  0101

thanks!

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1 Answer

  1. Editorial Team

    You can use join command:

    $ join file1.txt file2.txt
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