1

I run a random command in terminal and got this response:

Could not find the database of available applications, run update-command-not-found as root to fix this

Naturally, I run

update-command-not-found

as root, and it starts fetching the following files:

http://http.debian.net/debian/dists/jessie/main/Contents-i386.gz
http://http.debian.net/debian/dists/jessie/contrib/Contents-i386.gz
http://http.debian.net/debian/dists/jessie/non-free/Contents-i386.gz

However, the command did not completely finished, but instead throwing this error

I: Writing data for ftp.us.debian.org_debian_dists_jessie_main_Contents-i386.gz ...
Traceback (most recent call last):
File "/usr/sbin/update-command-not-found", line 95, in <module> write_db_apt_file()
File "/usr/sbin/update-command-not-found", line 72, in write_db_apt_file write_db_core(fobj)
File "/usr/sbin/update-command-not-found", line 39, in write_db_core for i in text:   File "/usr/lib/python2.7/gzip.py", line 462, in readline c = self.read(readsize)
File "/usr/lib/python2.7/gzip.py", line 268, in read self._read(readsize)
File "/usr/lib/python2.7/gzip.py", line 303, in _read self._read_gzip_header()
File "/usr/lib/python2.7/gzip.py", line 197, in _read_gzip_header raise IOError, 'Not a gzipped file' 
IOError: Not a gzipped file

I am stuck. Searching for update-command-not-found did not yield positive results to solve this problem, while searching for IOError: Not a gzipped file relates the problem with Python programming, which I do not understand a bit.

Is there any workarounds to solve this issue? This is on a fresh installed Debian Jessie (8), it was installed minimally and I added/removed some DE and packages later.

result from uname -a

Linux debian 3.16.0-4-686-pae #1 SMP Debian 3.16.7-ckt20-1+deb8u1 (2015-12-14) i686 GNU/Linux

result from lsb_release -rd

Description: DebianEdu/Skolelinux Release: 8.2

Thanks for any helps.

1

I found that update-command-not-found downloaded a handful of Contents-i386.gz files into /var/cache/apt/apt-file/ directory. Somehow, the files downloaded is faulty, the filesize did not match the original. Why this problem arise, still remains a mystery to me. I had to download manually using wget (with -O switch to rename the downloaded files) like below:

Here's the command (for copy-and-paste purpose):

wget http://ftp.us.debian.org/debian/dists/jessie/main/Contents-i386.gz -O /var/cache/apt/apt-file/ftp.us.debian.org_debian_dists_jessie_main_Contents-i386.gz

And do the same thing for rest of the files:

wget http://http.debian.net/debian/dists/jessie/main/Contents-i386.gz -O /var/cache/apt/apt-file/http.debian.net_debian_dists_jessie_main_Contents-i386.gz
wget http://http.debian.net/debian/dists/jessie/contrib/Contents-i386.gz -O /var/cache/apt/apt-file/http.debian.net_debian_dists_jessie_contrib_Contents-i386.gz
wget http://http.debian.net/debian/dists/jessie/non-free/Contents-i386.gz -O /var/cache/apt/apt-file/http.debian.net_debian_dists_jessie_non-free_Contents-i386.gz

Now that /var/cache/apt/apt-file/ contains the correct files, I can run update-command-not-found with -n switch to prevent this command downloads and overwrites the correct files with the faulty ones.

root@debian:/var/cache/apt# update-command-not-found -n
I: Writing data for ftp.us.debian.org_debian_dists_jessie_main_Contents-i386.gz ... . done
I: Writing data for http.debian.net_debian_dists_jessie_contrib_Contents-i386.gz ... . done
I: Writing data for http.debian.net_debian_dists_jessie_main_Contents-i386.gz ... . done
I: Writing data for ftp.us.debian.org_debian_dists_jessie-updates_main_Contents-i386.gz ... . done
I: Writing data for http.debian.net_debian_dists_jessie_non-free_Contents-i386.gz ... . done

NB: I had to delete security.debian.org_dists_jessie_updates_main_Contents-i386.gz from within /var/cache/apt/apt-file/ directory because previous wget results in ERROR 404: Not Found.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.