Published Sep 26 2020
wc command gives us useful information about a file or input it receives via pipes.
echo test >> test.txt wc test.txt 1 1 5 test.txt
Example via pipes, we can count the output of running the
ls -al command:
ls -al | wc 6 47 284
The first column returned is the number of lines. The second is the number of words. The third is the number of bytes.
We can tell it to just count the lines:
wc -l test.txt
or just the words:
wc -w test.txt
or just the bytes:
wc -c test.txt
Bytes in ASCII charsets equate to characters, but with non-ASCII charsets, the number of characters might differ because some characters might take multiple bytes, for example this happens in Unicode.
In this case the
-m flag will help getting the correct value:
wc -m test.txt
wccommand works on Linux, macOS, WSL, and anywhere you have a UNIX environment
I wrote an entire book on this topic 👇