Updates basics_of_linux.md

### Editing text

`sed` - Can perform basic editing on streams, that is to say, text.

#### sed

Can perform basic editing on streams, that is to say, text.

Remove first line of file/stream

sed "1d"

```

`awk`

`cut` - Cut by column

#### cut

Cut by column

This is a useful command to cut in text.

**tr** - Translate

#### tr - Translate

Transform all letter into capital letters

[http://www.thegeekstuff.com/2012/12/linux-tr-command/](http://www.thegeekstuff.com/2012/12/linux-tr-command/)

**awk** 

#### awk 

So awk is an advanced tool for editing text-files. It is its own programming language to it can become quite complex. Awk iterates over the whole file line by line.