Upgrade from one stable DebianParl version to the next

Wheezy → Jessie

Select rescue mode in menu before disk encryption
At the black text console, type the following and hit RETURN:
```
dpkg-reconfigure unattended-upgrades
```
Hit enter to confirm that you want to enable automatic updates.
To finish rescue mode and go to regular login, type this and hit RETURN:
```
exit
```

Allocate more of the disk space to core parts of the system ===

Select rescue mode in menu before disk encryption (or continue from above without exiting).
At the black text console you should have a "cursor" (a place to type) on an almost blank line after a #". Type the following and hit RETURN (it means "reduce your document area by ten gigabyte):
```
lvreduce --size -10g -r /dev/debian/home
```
When above is done (and emitted no scary looking messages) you should be back at an almost blank line ending with "#". Now type the following and hit RETURN (notice the + unlike above):
```
lvextend --size 1g -r /dev/debian/root
```
To finish rescue mode and go to regular login, type this and hit RETURN:
```
exit
```