Added in data stream info

docs/commands.md

@@ -1,6 +1,6 @@
-#Commands
+# Commands
 
-## Files
+## Manipulating files
 
 Commands that can be used for reading and manipulating files
 
@@ -49,8 +49,12 @@ Commands that can be used for reading and manipulating files
 
 Some examples of grep usage can be found [here](/examples/grep)
 
-### losof
+### lsof
 
 `lsof` is a command that will show you what processes have specified file open currently you can see an example [here](/examples/lsof)
 
+## Manipulating the standard input
+
+These commands can be used to manipulate data in the standard input
+
 ### rev

docs/examples/lsof.md

@@ -1,6 +1,8 @@
 # lsof examples
 
-`[ben@jamyn] ~/Documents/Projects/Python/mkdocs-pages$ lsof docs/index.md`
+In this example we can see that the docs/index.md file is currently open by the tail command
+
+`[ben@jamyn ~/Documents/Projects/Python/mkdocs-pages]$ lsof docs/index.md`
 
 ```bash
 COMMAND   PID USER   FD   TYPE DEVICE SIZE/OFF    NODE NAME

docs/examples/regexmatch.md

@@ -1,11 +1,12 @@
-#Regex examples
+# Regex examples
 
-##Match an IP address
+## Match an IP address
 `\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}`
 
 If we use this expression on the following using grep to search the file
 
 `grep -oP '\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}' log.txt'`
+
 ```bash
 103.252.153.201
 127.0.0.1 - - [30/Dec/2018 22:43:01] "GET / HTTP/1.0" 200 -

docs/shellbasics.md

@@ -0,0 +1,19 @@
+# Basics of the linux shell
+
+## Streams
+
+The linux shell (this will usually be [`bash`](bash.md)) works using different streams
+
+The main three streams that are used on the command line are STDIN (Standard input), STDOUT (Standard output), STDERR (Standard Error)
+
+|ID|STREAM|USE|
+|---|:----|:---|
+| 0 | STDIN | Used to send input to the program |
+| 1 | STDOUT | Used to receive output from the program |
+| 2 | STDERR | Used to receive errors from the program |
+
+### Standard Input
+
+Standard input is how we send input to an application it is also how we interact with the command line shell (Usually [`bash`](/bash.md))
+
+Once thing that makes the linux command line so powerfull is the suite of commands that is provided all work using STDIN, STDOUT and STDERR you can pipe information from one stream to another (i.e the STDOUT from one program can be in STDIN to another)