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Linux uniq命令使用简介-12666522-51CTO博客
source link: http://blog.51cto.com/12676522/2066754
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uniq命令用于报告或忽略文件中的重复行，一般与sort命令结合使用。语法uniq(选项)(参数)选项-c或——count：在每列旁边显示该行重复出现的次数；-d或--repeated：仅显示重复出现的行列；-f<栏位>或--skip-fields=<栏位>：忽略比较指定的栏位；-s<字符位置>或--skip-chars=<字符位置>：忽略比较
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