我有一份我每天下载的电影列表，格式如下
act-of-valor-2012
act-of-valor-2012
the-possession-2012
the-possession-2012
american-crude-2008
american-crude-2008
when-strangers-appear-2001
like-father-like-son-2005
like-father-like-son-2005
get-him-to-the-greek-2010
get-him-to-the-greek-2010
wall-street-money-never-sleeps-2010
wall-street-money-never-sleeps-2010
christmas-evil-1980
days-of-glory-1944
我需要保持相同的顺序，但删除 dupl.icate 行，使其成为
act-of-valor-2012
the-possession-2012
american-crude-2008
when-strangers-appear-2001
like-father-like-son-2005
get-him-to-the-greek-2010
wall-street-money-never-sleeps-2010
christmas-evil-1980
days-of-glory-1944
排序更改顺序任何人有任何想法我如何才能做到这一点？
谢谢
command-line ×1