change formatting

input examples are now given as

```bash
input $ARG1
```

While outputs use md's '> ' sign as a quote.

virtualization/virtualbox.md

@@ -6,33 +6,49 @@ tags: [ "Documentation", "System" ]
 
 ## Arch Linux
 
-> sudo pacman -S virtualbox-host-modules-arch virtualbox-guest-iso
+```bash
+sudo pacman -S virtualbox-host-modules-arch virtualbox-guest-iso
+```
 
-> sudo modprobe vboxdrv
+```bash
+sudo modprobe vboxdrv
+```
 
-> # vboxreload
+```bash
+# vboxreload
+```
 
 Make dd image into vdi
 
-> VBoxManage convertdd base.dd output.vdi --format VDI
+```bash
+VBoxManage convertdd base.dd output.vdi --format VDI
+```
 
 If this doesn't work, try to make a new bite size with just
 
-> sudo dd if=image.dd of=image2.dd bs=512 conv=sync
+```bash
+sudo dd if=image.dd of=image2.dd bs=512 conv=sync
+```
 
 ## CLI Management
 
 List boxes:
 
-> VBoxManage list vms
+```bash
+VBoxManage list vms
+```
 
 Start a headless instance
 
-> VBoxManage startvm "rata" --type headless
+```bash
+VBoxManage startvm "rata" --type headless
+```
 
 To pause the machine:
 
-> VBoxManage controlvm "rata" pause --type headless
+```bash
+VBoxManage controlvm "rata" pause --type headless
+```
 
 You can do a number of things to virtualboxes this way:
 
@@ -48,11 +64,17 @@ You can do a number of things to virtualboxes this way:
 
 Creating a VM requires registering it:
 
-> VBoxManage createvm --name Ubuntu19.04 --register  --ostype Ubuntu
+```bash
+VBoxManage createvm --name Ubuntu19.04 --register  --ostype Ubuntu
+```
 
-> VBoxManage modifyvm Ubuntu19.04 --memory 1042
+```bash
+VBoxManage modifyvm Ubuntu19.04 --memory 1042
+```
 
-> VBoxManage storagectl Ubuntu19.04 -name IDE --add ide --controller PIIX4  --bootable on
+```bash
+VBoxManage storagectl Ubuntu19.04 -name IDE --add ide --controller PIIX4  --bootable on
+```
 
 Create just a disk with: