I have a problem with Yum - Centos

[ServerFirma]

Hi all,

I've tried to work with yum. but if I "yum install .." enter, then i get this error :

 error: no dbpath has been set
error: cannot open Packages database in /%{_dbpath}
Traceback (most recent call last):
  File "/usr/bin/yum", line 30, in ?
    yummain.main(sys.argv[1:])
  File "/usr/share/yum/yummain.py", line 163, in main
    (log, errorlog, filelog, conf, cmds) = parseCmdArgs(args)
  File "/usr/share/yum/yummain.py", line 75, in parseCmdArgs
    conf=yumconf(configfile=yumconffile)
  File "/usr/share/yum/config.py", line 155, in __init__
    self.yumvar['releasever'] = self._getsysver()
  File "/usr/share/yum/config.py", line 285, in _getsysver
    idx = ts.dbMatch('provides', self.distroverpkg)
TypeError: rpmdb open failed 
  

What do i have to do ?
I've tried this too, but it hasn't fixed

 rm -rf /var/lib/rpm/__db*
rpm --rebuilddb 
  

[ServerFirma]

Hi all,

Have you no idea ?

[Rubberman]

Interesting. Which version of CentOS are you running, and how did you install it? Also, did yum ever work for you? From your error messages it seems that something has nuked your yum configuration information. What do you see in /etc/yum and /etc/yum.repos.d? FYI, they are directories.

[ServerFirma]

Interesting. Which version of CentOS are you running, and how did you install it? Also, did yum ever work for you? From your error messages it seems that something has nuked your yum configuration information. What do you see in /etc/yum and /etc/yum.repos.d? FYI, they are directories.

1. The version is CentOS Linux 5.3 .
2. Yes, Yum have already worked for me.
3. i see in /etc/yum

pluginconf.d
yum-updatesd.conf

4. i see in /etc/yum.repos.d

CentOS-Base.repo
CentOS-Media.repo
lxlabs.repo
openvz.repo

[Rubberman]

Yum is a python script. Did you do anything that might have messed up your python installation recently? Here is the sum total of the yum executable:

#!/usr/bin/python
import sys
try:
    import yum
except ImportError:
    print >> sys.stderr, """\
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

   %s

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:
%s

If you cannot solve this problem yourself, please go to
the yum faq at:
  http://wiki.linux.duke.edu/YumFaq

""" % (sys.exc_value, sys.version)
    sys.exit(1)

sys.path.insert(0, '/usr/share/yum-cli')
try:
    import yummain
    yummain.user_main(sys.argv[1:], exit_code=True)
except KeyboardInterrupt, e:
    print >> sys.stderr, "\n\nExiting on user cancel."
    sys.exit(1)

In any case, the traceback from python indicates where the error is coming from - /usr/share/yum/config.py
Sorry, but I don't have the time to debug this for you further than this. The only conclusion I can come to is that something has munged your yum/python configuration.