rama100

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|                          Task                                     |                  One-Liner                                        
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| Count the number of lines in a file                               | wc -l filename                                                     |
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| Show the field names, one in each line, preceded by line numbers  | head -1 filename | tr ‘\t’ ‘\n’ | nl    (tab-delimited file)       |
| (helpful when you have numerous fields in a new file and want to  | head -1 filename | tr ‘,’ ‘\n’ | nl     (comma-delimited file)     |
| get the lay of the land)