Added many more pages

docs/commands.md

@@ -1,9 +1,21 @@
 #Commands
 
 ##Files
+
 ###tail
 `tail` by default reads the last 5 lines of the input file and then exits
 
+| Useful Flags         | Function      |
+| ------------- |:-------------|
+| -n *x*          | Returns the last x lines of a file |
+| -f     		| Follows the end of the file, so any new data will be printed out to the screen |
+
+###head
+`head` by default reads the first 5 lines of the input file and then exits
+
+| Useful Flags         | Function      |
+| ------------- |:-------------|
+| -n *x*          | Returns the first x lines of a file |
 
 ###awk
 `awk` is used to extract, layout and modify data using the command line (It is way more then this but its all I use it for)
@@ -14,10 +26,22 @@
 
 | Useful Flags         | Function      |
 | ------------- |:-------------|
-| -i            | in-place, writes the changes to the file |
+| -i            | In-place, writes the changes to the file |
 | -f     		| Use a script file instead of reading the expression from STDIN      |
 
 
 ###grep
+`grep` is used to match text in a file, 
+
+| Useful Flags         | Function      |
+| ------------- |:-------------|
+| -o            | Returns only the matched data (Useless without regex really) |
+| -E     		| Allows extended regex to be used in the search, [regex info](/regex)|
+| -P 			| Allows the use of Perl regex, this uses a different syntax to -E |
+| -i 			| Makes the search case insensitive |
+| -r 			| Searches files recursively (i.e if you have quite a few files and folders it will search through all of them) |
+| -l 			| Returns the filename where the data was matched instead of the matched data |
+
+Some examples of grep usage can be found [here](/examples/grep)
 
 ###rev

docs/examples/grep.md

@@ -0,0 +1,2 @@
+#Grep examples
+

docs/examples/regexmatch.md

@@ -0,0 +1,59 @@
+#Regex examples
+
+##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'`
+```
+103.252.153.201
+127.0.0.1 - - [30/Dec/2018 22:43:01] "GET / HTTP/1.0" 200 -
+210.49.93.254, 66.102.6.169
+127.0.0.1 - - [31/Dec/2018 09:17:47] "GET / HTTP/1.0" 200 -
+210.49.93.254, 66.102.6.173
+127.0.0.1 - - [31/Dec/2018 09:17:48] "GET /favicon.ico HTTP/1.0" 200 -
+112.140.176.2
+127.0.0.1 - - [01/Jan/2019 01:58:43] "GET / HTTP/1.0" 200 -
+112.140.176.2
+127.0.0.1 - - [01/Jan/2019 01:58:45] "GET /favicon.ico HTTP/1.0" 200 -
+112.140.176.2
+127.0.0.1 - - [01/Jan/2019 01:58:51] "POST / HTTP/1.0" 200 -
+112.140.176.2
+127.0.0.1 - - [01/Jan/2019 01:58:51] "GET /favicon.ico HTTP/1.0" 200 -
+112.140.176.2
+127.0.0.1 - - [01/Jan/2019 02:13:07] "GET /EviXDWpXvH HTTP/1.0" 200 -
+210.49.93.254, 66.102.6.171
+127.0.0.1 - - [02/Jan/2019 10:32:17] "GET / HTTP/1.0" 200 -
+210.49.93.254, 66.102.6.173
+127.0.0.1 - - [02/Jan/2019 10:32:18] "GET /favicon.ico HTTP/1.0" 200 -
+```
+
+The output will be a list of IP addresses in the file that looks like
+
+```
+103.252.153.201
+127.0.0.1
+210.49.93.254
+66.102.6.169
+127.0.0.1
+210.49.93.254
+66.102.6.173
+127.0.0.1
+112.140.176.2
+127.0.0.1
+112.140.176.2
+127.0.0.1
+112.140.176.2
+127.0.0.1
+112.140.176.2
+127.0.0.1
+112.140.176.2
+127.0.0.1
+210.49.93.254
+66.102.6.171
+127.0.0.1
+210.49.93.254
+66.102.6.173
+127.0.0.1
+```

docs/regex.md

@@ -0,0 +1,26 @@
+#Regex
+
+I am by no means an expert when it comes to regex, this document will propbably have some inaccuracies in it but hey it is what it is :)
+
+##What is regex?
+
+Regex is shorthand for regular expressions, it is a system for pattern matching in text, when combined with commands it can be used for quite a lot of things
+
+##Useful regex patterns
+* **.** \- Matches any char
+* **^** \- Matches at the start of a line
+* **$** \- Matches at the end of a line
+* **?** \- Matches once or none
+* **+** \- Matches once or more
+* **\*** \- Matches zero or more times
+* **\d** \- Match any decimal (0-9)
+* **\b** \- Defines a word boundary
+* **{x}** \- Repeat exactly x times
+* **{x, y}** \- Repeat pattern x to y times
+
+##Regex logic
+
+* **|** \- Logical OR, allows pattern1 OR pattern2 to match
+* **(x|y)** \- Matches a group of patterns
+
+I have made a few examples [here](/examples/regexmatch)

mkdocs.yml

@@ -3,4 +3,5 @@ nav:
         - Home: index.md
         - Commands: commands.md
         - Connections: connections.md
+        - Regex: regex.md
 theme: readthedocs