Fixed up command blocks

docs/examples/lsof.md

@@ -1,7 +1,8 @@
 # lsof examples
 
-`ben@jamyn  ~/Documents/Projects/Python/mkdocs-pages   master  lsof docs/index.md`
+`[ben@jamyn] ~/Documents/Projects/Python/mkdocs-pages$ lsof docs/index.md`
 
+```bash
 COMMAND   PID USER   FD   TYPE DEVICE SIZE/OFF    NODE NAME
-
-tail    17481  ben    3r   REG   0,49      240 1220028 docs/index.md
+tail    17481  ben    3r   REG   0,49      240 1220028 docs/index.md
+```

docs/examples/regexmatch.md

@@ -6,7 +6,7 @@
 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 -
 210.49.93.254, 66.102.6.169
@@ -31,7 +31,7 @@ If we use this expression on the following using grep to search the file
 
 The output will be a list of IP addresses in the file that looks like
 
-```
+```bash
 103.252.153.201
 127.0.0.1
 210.49.93.254

docs/examples/seddnszone.md

@@ -2,7 +2,7 @@
 
 Take the following DNS zone as an example, say we needed to update the IP address from 110.232.142.185 to 45.65.88.152, you could modify the file using a text editor (see [editors](/commands#editors))
 
-```
+```bash
 $TTL 86400
 @ IN SOA ns1.benjamyn.love. servers.benjamyn.love. (
 	2018043009 ;Serial
@@ -26,7 +26,7 @@ ftp IN CNAME memes.sh.
 In this case we can just use `sed -i s/110.232.142.185/45.65.88.152/g filename`
 
 The file gets changed to
-```
+```bash
 $TTL 86400
 @ IN SOA ns1.benjamyn.love. servers.benjamyn.love. (
 	2018043009 ;Serial
@@ -51,7 +51,7 @@ You can also use sed to update things like the serial number using some regex (w
 
 The command will look like `sed -i s/.*Serial/"    2019010308 ;Serial"/g filename` (The quotes are to escape the ; character) and when run against the DNS zone it will update will look like
 
-```
+```bash
 $TTL 86400
 @ IN SOA ns1.benjamyn.love. servers.benjamyn.love. (
     2019010308 ;Serial <--