Ubuntu: “debconf: DbDriver ”config“: config.dat is locked by another process: Resource temporarily unavailable” while installing packages


I'm trying to install the flashybrid but when I enter the apt-get install flashybrid command, I get this error:

root@user-desktop:/home/user# apt-get install flashybrid  Reading package lists... Done  Building dependency tree  Reading state information... Done  flashybrid is already the newest version.  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.  1 not fully installed or removed.  After this operation, 0B of additional disk space will be used.  debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable  Setting up flashybrid (0.15+nmu2) ...  debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable  dpkg: error processing flashybrid (--configure):  subprocess post-installation script returned error exit status 1  Errors were encountered while processing:  flashybrid  E: Sub-process /usr/bin/dpkg returned an error code (1)  

I also tried this one to find what is already using that file:

root@user-desktop:/home/user# lsof | grep /var/cache/debconf/config.dat  lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/user/.gvfs  Output information may be incomplete.  dpkg-prec 4672 root 4rW REG 8,6 39658 1697827 /var/cache/debconf/config.dat  

But I don't know how to fix this.


This is more simple one command

I just did:

sudo rm /var/cache/debconf/*.dat   

After I run the apt-get install and (I was installing curl ) and it worked restored the db manual pages.

PS: I removed something with apt-get and I did have this problem. but solved it simply thank also to @rajagenupula


A solution to this locking problem is detailed in the wiki:

sudo fuser -v /var/cache/debconf/config.dat  

Will show you what process is holding the lock:

                     USER        PID ACCESS COMMAND  /var/cache/debconf/config.dat:                       root      18210 F.... dpkg-preconfigu  

Then you simply need to note down the PID and kill it like so:

sudo kill PID  sudo kill -9 PID  # if the first doesn't work  


  1. open your terminal
  2. open the location /var/cache/debconf with gksu nautilus
  3. move (cut/paste) all of the .dat files to another backup directory.
  4. attempt to run again (will likely get a different error)
  5. restore those dat files from the aforementioned backup directory.
  6. Then try again what you were doing (should work this time).


sudo fuser -vik /var/cache/debconf/config.dat  

Will display the process and ask if you want to terminate it.


There is a process still running blocking debconf. You should wait until it finish. Or find out how it got stuck, since in some cases it will be try to ask you a question but since you don't have a scope to see it. If you wait sometime and things doesn't change you may need to reboot the system, or terminate the process.

sudo kill 4672  


sudo killall dpkg-prec  

This will assure you that your database will not get damaged and will prevent further problems.

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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