Err http://archive.ubuntu.com dapper/universe unixcw 2.2-14
  Could not open file /var/cache/apt/archives/partial/unixcw_2.2-14_i386.deb - open (30 Read-only file system)
Err http://archive.ubuntu.com dapper/universe cw 2.2-14
  Could not open file /var/cache/apt/archives/partial/cw_2.2-14_i386.deb - open (30 Read-only file system)
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/universe/u/unixcw/unixcw_2.2-14_i386.deb  Could not open file /var/cache/apt/archives/partial/unixcw_2.2-14_i386.deb - open (30 Read-only file system)
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/universe/u/unixcw/cw_2.2-14_i386.deb  Could not open file /var/cache/apt/archives/partial/cw_2.2-14_i386.deb - open (30 Read-only file system)
W: Not using locking for read only lock file /var/cache/apt/archives/lock
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?