[gentoo-user] KDE, sddm etc security. Plus LVM question.

[Dale]

Howdy,

I been thinking.  Yea, that's dangerous.  lol  If I logout of KDE, or
have the screen locked, ctrl+alt=L key sequence, how secure is that if I
have good passwords that are virtually impossible to crack?  My login
manager is sddm.  As a example, if someone breaks into my home, is there
a easy way to get past that?  I recall the old windoze 98 days where a
certain key sequence would bypass the password prompt.  Is there a way
known to crooks and such that can bypass or easily defeat passwords? 

I'm aware that if a person boots up where no password is required, that
will bypass, even as root if I recall correctly.  I'm just looking for
something that is even easier than that. 

Also, if I have a encrypted hard drive open and mounted and then cut off
power, doesn't that disable the decryption for the drive?  In other
words, I pull the plug and someone powers it back up, the drive is
encrypted again and requires a password. 

Also, I'm planning to reorganize and encrypt some more stuff here.  I
want to remove one hard drive from my home thingy.  Is it really as easy
as pvmove /dev/sdx the device I want to remove?  From my understanding I
need to reduce the file system first.  Is that correct?  I'm often
amazed at how easy some things can be done with LVM. 

Thanks to all for the thoughts.

Dale

:-)  :-)