unix – grep -l和grep -ln

发布时间：2020-12-15 21:45:15 所属栏目：安全来源：网络整理

导读：根据grep手册, -l,--files-with-matches Suppress normal output; instead print the name of each input file from which output would normally have been printed. The scanning will stop on the first match. grep -l,这似乎很好,因为当找到匹配时,回显

根据grep手册,

-l,--files-with-matches
          Suppress normal output; instead print the  name  of  each  input
          file  from  which  output would normally have been printed.  The
          scanning will stop on the first match.

grep -l,这似乎很好,因为当找到匹配时,回显包含匹配的文件名.

但是,当我执行grep -ln时,grep会回显该事件的每一行.

grep -l是否真的意味着在找到第一次匹配时停止并停止扫描,而grep -ln将忽略-l标志？

解决方法

这些选项不兼容.如果要在每个文件中显示第一个匹配(以及仅第一个匹配)的行号,请使用grep -Hnm 1.

-H,–with-filename
Print the filename for each match.

-n,–line-number
Prefix each line of output with the line number within its input file.

-m NUM,–max-count=NUM
Stop reading a file after NUM matching lines.

（编辑：李大同）

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