I wanted to try encryption on a partition, everything seems to work but I dont know how to write to the resulting encrypted partition, where is it?

/dev/hda8 is /opt
Here is what I have done:
cryptsetup -y create crypt /dev/hda8
mkfs reiserfs /dev/mapper/crypt
mount -t reiserfs /dev/mapper/crypt /opt

And here are the results:
# dmsetup ls
crypt (254, 0)

# mount
/dev/mapper/crypt on /opt type reiserfs (rw)

lt:/opt# ls -la
total 1
drwxr-xr-x 3 root root 48 2006-10-08 23:25 .
drwxr-xr-x 21 root root 1024 2006-07-27 17:04 ..
lt:/opt#

lt:/opt# find / -name crypt
/dev/mapper/crypt

Am I supposed to write to /dev/mapper/crypt? And will the encrypted file be in /opt?

Thank you for your help.

You are supposed to write to /opt, the file will be in /opt.
The filesystem will be encrypted, not individual files.
The encrypted filesystem will be in /dev/hda8. /dev/mapper/crypt is a "virtual" device - uncrypted /dev/hda8. Or, /dev/hda8 is "encrypted" version of /dev/mapper/crypt, which holds filed of /opt.

I hope I've confused you even more now

Sorry for the delay, I have been banned, reason given: none.

I wouldn't have the faintest idea why, my postings are always straight questions I take great care to have in the appropriate forum , or straight answers.

I never deviate from this.

I will retry encryption again and, if you don't mind, I'll probably have a couple more questions.

Thank you for your answer.

For any moderator or other administrative staff looking at this, I have to point out I am not bothered very much by being banned if no reason is given.

I have joined a paid service I used some years ago and I am quite ready to erase LQ from my machines.