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@ -295,7 +295,7 @@ A few examples of piecing together commands:
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cat a b b | sort | uniq -u > c # c is set difference a - b
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```
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- 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`.
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- 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`.
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- Summing all numbers in the third column of a text file (this is probably 3X faster and 3X less code than equivalent Python):
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