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line count in #bash
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| # first 4 digits right justified with zero padding | |
| nl -nrz -w4 file.txt | |
| # end of line | |
| awk '{ print $0, NR }' | |
| # cat (no padding) | |
| cat -n file.txt | |
| # grep (no padding) | |
| grep -n "" < file.txt |
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