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nl is a Unix utility for numbering lines, either from a file or from standard input, reproducing output on standard output. It has a number of switches: *a - number all lines *t - number lines with printable text only *n - no line numbering *string - number only those lines containing the regular expression defined in the ''string'' supplied. The default applied switch is ''t''. nl also supports a number of command line options. ==Example== $ nl tf 1 echo press cr 2 read cr 3 done The following example numbers only the lines that begin with a capital letter A (matching on the regular expression /^A/). ''filename'' is optional. $ nl -b p^A filename apple 1 Apple BANANA 2 Allspice strawberry It can be useful as an alternative to grep -n: $ cat somefile aaaa bbbb cccc dddc $ nl somefile | grep cccc 3 cccc 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nl (Unix)」の詳細全文を読む スポンサード リンク
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