13 Jun
2021
13 Jun
'21
6:14 a.m.
On Sun, 13 Jun 2021 at 06:51, Patrick Dupre pdupre@gmx.com wrote:
Hello,
I wish to remove lines which appear twice in a file, actually only when they appear more than one time. How can I do so?
Do you need to keep the lines in the same order? If not, then "sort -u" should work. You may also want to use "uniq".
% cat nonuniq.txt dd aa bb cc bb aa % sort -u nonuniq.txt aa bb cc dd
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George N. White III