Upgrading mysql-server with apt-get fails

[rockan]

sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
mysql-server-5.1
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
7 not fully installed or removed.
Need to get 0 B/6,594 kB of archives.
After this operation, 65.5 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Reading changelogs... Done
debconf: DbDriver "config": could not open /var/cache/debconf/config.dat
(Reading database ... 44909 files and directories currently installed.)
Preparing to replace mysql-server-5.1 5.1.61-0+squeeze1 (using .../mysql-server-5.1_5.1.63-0+squeeze1_amd64.deb) ...
debconf: DbDriver "config": could not open /var/cache/debconf/config.dat
dpkg: warning: subprocess old pre-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
debconf: DbDriver "config": could not open /var/cache/debconf/config.dat
dpkg: error processing /var/cache/apt/archives/mysql-server-5.1_5.1.63-0+squeeze1_amd64.deb (--unpack):
subprocess new pre-removal script returned error exit status 1
configured to not write apport reports
debconf: DbDriver "config": could not open /var/cache/debconf/config.dat
dpkg: error while cleaning up:
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
/var/cache/apt/archives/mysql-server-5.1_5.1.63-0+squeeze1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)


Does anyone know the solution?

[rosehosting]

sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
mysql-server-5.1
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
7 not fully installed or removed.
Need to get 0 B/6,594 kB of archives.
After this operation, 65.5 kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Reading changelogs... Done
debconf: DbDriver "config": could not open /var/cache/debconf/config.dat
(Reading database ... 44909 files and directories currently installed.)
Preparing to replace mysql-server-5.1 5.1.61-0+squeeze1 (using .../mysql-server-5.1_5.1.63-0+squeeze1_amd64.deb) ...
debconf: DbDriver "config": could not open /var/cache/debconf/config.dat
dpkg: warning: subprocess old pre-removal script returned error exit status 1
dpkg - trying script from the new package instead ...
debconf: DbDriver "config": could not open /var/cache/debconf/config.dat
dpkg: error processing /var/cache/apt/archives/mysql-server-5.1_5.1.63-0+squeeze1_amd64.deb (--unpack):
subprocess new pre-removal script returned error exit status 1
configured to not write apport reports
debconf: DbDriver "config": could not open /var/cache/debconf/config.dat
dpkg: error while cleaning up:
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
/var/cache/apt/archives/mysql-server-5.1_5.1.63-0+squeeze1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)


Does anyone know the solution?

is the '/var/cache/debconf' directory present? have you removed anything by hand?

if it is not present, you could try to create it by `mkdir -p /var/cache/debconf` and then run `apt-get update && apt-get upgrade`

[rockan]

Thanks a lot!! I love you.