Installing ftp Server on debian slug

[Tobias Wagner]

Hi all, 
for access to log files and creating backups I`d like to install ftp server on 
my nslu2. It is set up as advised on cyrius.com and running well.
I tried:> apt-get install proftpd
and got:> E: Could not open lock file /var/lib/dpkg/lock - open (2: No such 
file or directory) Indeed, the directory doesn't exist, so I created it and 
upon reentering the install command I got:> E: Unable to write to 
/var/cache/apt/
How can I make this work?
Thanks, Tobias.