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Thread: sed expression question

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good day everyone!
sorry ask how in sed "if 'string1' not exist add 'string2' end of file once"?
thank in advance!

use awk can keep counter/flag signify found.

code:
awk '/string1/{f=1}end{ if (!f) {print "string2"}}1' file
use best tool job.


Forum The Ubuntu Forum Community Ubuntu Specialised Support Development & Programming Programming Talk sed expression question


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