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Add another example of head

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And tweak language of #292.
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Joshua Levy 2015-10-05 21:16:37 -07:00
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@ -295,7 +295,7 @@ A few examples of piecing together commands:
cat a b b | sort | uniq -u > c # c is set difference a - b
```
- Use `grep . * | less` to quickly examine the contents of all files in a directory - each line is paired with the filename. This can be useful for directories filled with config settings like those in `/sys`, `/proc`, `/etc`.
- Use `grep . *` to quickly examine the contents of all files in a directory (so each line is paired with the filename), or `head -100 *` (so each file has a heading). This can be useful for directories filled with config settings like those in `/sys`, `/proc`, `/etc`.
- Summing all numbers in the third column of a text file (this is probably 3X faster and 3X less code than equivalent Python):