common/u*: add Chinese translation (#14688)
* common/u*: add Chinese translation * Update uv-tool.md * Update ugrep.md
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# uniq
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> 输出输入或文件中的唯一行。
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> 因为它只检测相邻的重复行,所以需要先对它们进行排序。
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> 更多信息:<https://www.gnu.org/software/coreutils/uniq>.
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- 仅显示每行一次:
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`sort {{路径/到/文件}} | uniq`
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- 仅显示唯一的行:
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`sort {{路径/到/文件}} | uniq -u`
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- 仅显示重复的行:
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`sort {{路径/到/文件}} | uniq -d`
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- 显示每行的出现次数及其内容:
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`sort {{路径/到/文件}} | uniq -c`
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- 显示每行的出现次数,并按出现次数从高到低排序:
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`sort {{路径/到/文件}} | uniq -c | sort -nr`
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