bash - find and save words from 2 files -


i have 2 txt file's words (1.txt , 2.txt)

1.txt

abc cda sda era

2.txt

krt gor abc sda rtr

how can obtain list of words in both 1.txt , 2.txt?

example of need obtain result

output.txt

abc sda

thank you.

use gnu grep:

grep -wf file1 file2

or

grep -wf file2 file1

output:

 abc sda

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