15 Linux Split and Join Command Examples to Manage Large Fil

In the following example,the first column of testfile1 was compared with the second column of testfile2 to produce the join command output.

$ cat testfile1
a India
b US
c Ireland
d UK
e Canada
$ cat testfile2

NewDelhi a

Washington b

Dublin c

London d

Toronto e
$ join -1 1 -2 2 testfile1 testfile2

a India NewDelhi

b US Washington

c Ireland Dublin

d UK London

e Canada Toronto

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