This bug is still unfixed in Hardy (8.04): me@host:~$aptitude install yum [...] me@host:~$ yum There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: No module named cElementTree Please install a package which provides this module, or verify that the module is installed correctly. It's possible that the above module doesn't match the current version of Python, which is: 2.5.2 (r252:60911, Jul 31 2008, 17:28:52) [GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] If you cannot solve this problem yourself, please send this message to . but ATM I tested on Intrepid Ibex Alpha 5, and it seems to be ok... have a look: ubuntu@ubuntu:~$ sudo aptitude install yum Reading package lists... Done Building dependency tree Reading state information... Done Reading extended state information Initializing package states... Done The following NEW packages will be installed: libbeecrypt6{a} librpm4.4{a} python-celementtree{a} python-elementtree{a} python-pyme{a} python-rpm{a} python-sqlite{a} python-sqlitecachec{a} python-urlgrabber{a} rpm{a} yum 0 packages upgraded, 11 newly installed, 0 to remove and 372 not upgraded. Need to get 2919kB of archives. After unpacking 11.9MB will be used. Do you want to continue? [Y/n/?] Y Writing extended state information... Done Get:1 http://archive.ubuntu.com intrepid/main libbeecrypt6 4.1.2-7 [103kB] Get:2 http://archive.ubuntu.com intrepid/main librpm4.4 4.4.2.3-1ubuntu1 [977kB] Get:3 http://archive.ubuntu.com intrepid/universe python-elementtree 1.2.6-12 [27.4kB] Get:4 http://archive.ubuntu.com intrepid/universe python-celementtree 1.0.5-10 [21.9kB] Get:5 http://archive.ubuntu.com intrepid/universe python-pyme 0.8.0-2 [225kB] Get:6 http://archive.ubuntu.com intrepid/universe python-sqlite 1.0.1-7 [35.4kB] Get:7 http://archive.ubuntu.com intrepid/main python-urlgrabber 3.1.0-4 [56.6kB] Get:8 http://archive.ubuntu.com intrepid/main rpm 4.4.2.3-1ubuntu1 [638kB] Get:9 http://archive.ubuntu.com intrepid/main python-rpm 4.4.2.3-1ubuntu1 [429kB] Get:10 http://archive.ubuntu.com intrepid/universe python-sqlitecachec 1.1.2-1 [37.9kB] Get:11 http://archive.ubuntu.com intrepid/universe yum 3.2.12-1.2 [367kB] Fetched 2919kB in 1s (2486kB/s) Selecting previously deselected package libbeecrypt6. (Reading database ... 101177 files and directories currently installed.) Unpacking libbeecrypt6 (from .../libbeecrypt6_4.1.2-7_i386.deb) ... Selecting previously deselected package librpm4.4. Unpacking librpm4.4 (from .../librpm4.4_4.4.2.3-1ubuntu1_i386.deb) ... Selecting previously deselected package python-elementtree. Unpacking python-elementtree (from .../python-elementtree_1.2.6-12_all.deb) ... Selecting previously deselected package python-celementtree. Unpacking python-celementtree (from .../python-celementtree_1.0.5-10_i386.deb) ... Selecting previously deselected package python-pyme. Unpacking python-pyme (from .../python-pyme_0.8.0-2_i386.deb) ... Selecting previously deselected package python-sqlite. Unpacking python-sqlite (from .../python-sqlite_1.0.1-7_i386.deb) ... Selecting previously deselected package python-urlgrabber. Unpacking python-urlgrabber (from .../python-urlgrabber_3.1.0-4_all.deb) ... Selecting previously deselected package rpm. Unpacking rpm (from .../rpm_4.4.2.3-1ubuntu1_i386.deb) ... Selecting previously deselected package python-rpm. Unpacking python-rpm (from .../python-rpm_4.4.2.3-1ubuntu1_i386.deb) ... Selecting previously deselected package python-sqlitecachec. Unpacking python-sqlitecachec (from .../python-sqlitecachec_1.1.2-1_i386.deb) ... Selecting previously deselected package yum. Unpacking yum (from .../yum_3.2.12-1.2_all.deb) ... Processing triggers for man-db ... Setting up libbeecrypt6 (4.1.2-7) ... Setting up librpm4.4 (4.4.2.3-1ubuntu1) ... Setting up python-elementtree (1.2.6-12) ... Setting up python-celementtree (1.0.5-10) ... Setting up python-pyme (0.8.0-2) ... Setting up python-sqlite (1.0.1-7) ... Setting up python-urlgrabber (3.1.0-4) ... Setting up rpm (4.4.2.3-1ubuntu1) ... Setting up python-rpm (4.4.2.3-1ubuntu1) ... Setting up python-sqlitecachec (1.1.2-1) ... Setting up yum (3.2.12-1.2) ... * Starting yum-updatesd yum-updatesd [ OK ] Processing triggers for libc6 ... ldconfig deferred processing now taking place Processing triggers for python-support ... Reading package lists... Done Building dependency tree Reading state information... Done Reading extended state information Initializing package states... Done Writing extended state information... Done ubuntu@ubuntu:~$ yum rpm: To install rpm packages on Debian systems, use alien. See README.Debian. error: cannot open Packages index using db3 - No such file or directory (2) error: cannot open Packages database in /var/lib/rpm Traceback (most recent call last): File "/usr/bin/yum", line 29, in yummain.user_main(sys.argv[1:], exit_code=True) File "/usr/share/yum-cli/yummain.py", line 236, in user_main errcode = main(args) File "/usr/share/yum-cli/yummain.py", line 91, in main base.getOptionsConfig(args) File "/usr/share/yum-cli/cli.py", line 180, in getOptionsConfig disabled_plugins=self.optparser._splitArg(opts.disableplugins)) File "/var/lib/python-support/python2.5/yum/__init__.py", line 170, in _getConfig self._conf = config.readMainConfig(startupconf) File "/var/lib/python-support/python2.5/yum/config.py", line 726, in readMainConfig yumvars['releasever'] = _getsysver(startupconf.installroot, startupconf.distroverpkg) File "/var/lib/python-support/python2.5/yum/config.py", line 793, in _getsysver idx = ts.dbMatch('provides', distroverpkg) TypeError: rpmdb open failed ubuntu@ubuntu:~$ sudo yum You need to give some command Usage: yum [options] COMMAND List of Commands: check-update Check for available package updates clean Remove cached data deplist List a package's dependencies erase Remove a package or packages from your system groupinfo Display details about a package group groupinstall Install the packages in a group on your system grouplist List available package groups groupremove Remove the packages in a group from your system help Display a helpful usage message info Display details about a package or group of packages install Install a package or packages on your system list List a package or groups of packages localinstall Install a local RPM makecache Generate the metadata cache provides Find what package provides the given value reinstall reinstall a package repolist Display the configured software repositories resolvedep Determine which package provides the given dependency search Search package details for the given string shell Run an interactive yum shell update Update a package or packages on your system upgrade Update packages taking obsoletes into account Options: -h, --help show this help message and exit -t, --tolerant be tolerant of errors -C run entirely from cache, don't update cache -c [config file] config file location -R [minutes] maximum command wait time -d [debug level] debugging output level -e [error level] error output level -q, --quiet quiet operation -v, --verbose verbose operation -y answer yes for all questions --version show Yum version and exit --installroot=[path] set install root --enablerepo=[repo] enable one or more repositories (wildcards allowed) --disablerepo=[repo] disable one or more repositories (wildcards allowed) -x [package], --exclude=[package] exclude package(s) by name or glob --disableexcludes=[repo] disable exclude from main, for a repo or for everything --obsoletes enable obsoletes processing during updates --noplugins disable Yum plugins --nogpgcheck disable gpg signature checking --disableplugin=[plugin] disable plugins by name --skip-broken skip packages with depsolving problems ubuntu@ubuntu:~$ sudo yum update Setting up Update Process No Packages marked ubuntu@ubuntu:~$ Hecnce I assume this bug could be fixed for Intrepid...