multiple typos

```
algorihtms
algrorithm
authentithication
backupd
baskup
bufer
calagoue
Checnge
Concatinate
concurrect
containig
corrup
Culd
cutted
decmpress
descendats
destionation
deteremine
direcory
Direcotry
directoties
dissappearance
ecovery-target-lsn
Eeach
erroneus
extention
```