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A comment on I've been writing TILs for 5 years. Parent comment

Re:I've been writing TILs for 5 years by dylan604 on Saturday April 18, 2020 @10:02PM (#22912842)
!cmd = repeat last usage of that command

!!enter which is 3 buttons where as up-arrow enter is the same thing.

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Re:I've been writing TILs for 5 years by Something1234 on Saturday April 18, 2020 @10:19PM (#22912919)
!! is more useful than you think. It's substitute last command here, not just up-arrow enter.

See sudo !!.

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