nl
List of commands for nl:
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nl:tldr:1ffad nl: Read from standard output.$ cat ${filename} | nl ${options} -try on your machineexplain this command
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nl:tldr:6b4b1 nl: Number only the body lines that match a basic regular expression (BRE) pattern.$ nl -b p'FooBar[0-9]' ${filename}try on your machineexplain this command
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nl:tldr:7eea0 nl: Number all lines including blank lines.$ nl -b a ${filename}try on your machineexplain this command
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nl:tldr:9e6ce nl: Number non-blank lines in a file.$ nl ${filename}try on your machineexplain this command
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nl:tldr:a5471 nl: Number only the lines with printable text.$ nl -t ${filename}try on your machineexplain this command