@ -242,11 +242,8 @@ A few examples of piecing together commands:
cat a b b | sort | uniq -u > c # c is set difference a - b
```
- Use `grep . *` to visually examine all contents of all files in a directory. Useful for directories filled with config settings, like /sys /proc /etc.
```sh
cd /proc/sys/net/ipv4
grep . *
```
- Use `grep . *` to visually examine all contents of all files in a directory, e.g. for directories filled with config settings, like `/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):