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Comments on How to count the lines of a file?

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How to count the lines of a file?

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How to get the number of lines in a file?

I.e. for a file like this:

Line one
Line 2
Final line

I would like to do something like this:

$ count-lines /path/to/the/file/above
3
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I think the typical way to do this uses wc ("word count") with the -l ("lines") option.

$ wc -l /path/to/file
    47 /path/to/file

$ wc -l </path/to/file
47

$ cat /path/to/file | wc -l
47

wc with no options prints the number of lines, words, and bytes, but -l can limit it to just lines. As a comment notes: "lines" is the number of newline characters, so you may be off-by-one if you don't have a trailing newline.

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Newline characters (2 comments)
Newline characters
Iizuki‭ wrote 3 months ago

Yes this works for most uses, but it's good to keep in mind that this counts newline characters, not lines of text as we humans perceive them. In particular it's not guaranteed that a file ends in a newline, leading to the count being off by one.

Michael‭ wrote 3 months ago

True. If your file was made with *Nix-y tools, it probably has the trailing newline, though.