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I'm trying to update clamav on an old CentOS 5 mail server installation, but keep getting a dependency error which I can't understand.

I followed the method described here.

Perhaps someone can show me the way through this?

[root@s1 ~]# yum list clamav
Loaded plugins: fastestmirror, priorities
Loading mirror speeds from cached hostfile
 * base: centos.mirror.facebook.net
 * extras: centos-distro.cavecreek.net
 * rpmforge: mirror.hmc.edu
 * updates: mirror.thelinuxfix.com
base | 1.1 kB 00:00 
dag | 1.9 kB 00:00 
extras | 2.1 kB 00:00 
rpmforge | 1.9 kB 00:00 
updates | 1.9 kB 00:00 
Excluding Packages in global exclude list
Finished
Installed Packages
clamav.i386 0.97.6-1.el5.rf installed
clamav.i386 0.97.7-1.el5.rf installed
[root@s1 ~]# 



[root@s1 ~]# yum update clamav
Loaded plugins: fastestmirror, priorities
Loading mirror speeds from cached hostfile
 * base: centos.mirror.facebook.net
 * extras: centos-distro.cavecreek.net
 * rpmforge: mirror.hmc.edu
 * updates: mirror.thelinuxfix.com
base | 1.1 kB 00:00 
dag | 1.9 kB 00:00 
extras | 2.1 kB 00:00 
rpmforge | 1.9 kB 00:00 
updates | 1.9 kB 00:00 
Excluding Packages in global exclude list
Finished
Setting up Update Process
Resolving Dependencies
--> Running transaction check
--> Processing Dependency: clamav = 0.97.6-1.el5.rf for package: clamd
---> Package clamav.i386 0:0.97.7-1.el5.rf set to be updated
--> Finished Dependency Resolution
clamd-0.97.6-1.el5.rf.i386 from installed has depsolving problems
 --> Missing Dependency: clamav = 0.97.6-1.el5.rf is needed by package clamd-0.97.6-1.el5.rf.i386 (installed)
Error: Missing Dependency: clamav = 0.97.6-1.el5.rf is needed by package clamd-0.97.6-1.el5.rf.i386 (installed)
 You could try using --skip-broken to work around the problem
 You could try running: package-cleanup --problems
 package-cleanup --dupes
 rpm -Va --nofiles --nodigest
[root@s1 ~]# 

The above results are obtained after running the suggested:

package-cleanup --problems
package-cleanup --dupes
rpm -Va --nofiles --nodigest

I ran yum --disablerepo=* --enablerepo=rpmforge update clam* in accordance with an answer and received the following terminal output:

[root@s1 ~]# yum --disablerepo=* --enablerepo=rpmforge update clam*
Loaded plugins: fastestmirror, priorities
Loading mirror speeds from cached hostfile
 * rpmforge: mirror.hmc.edu
rpmforge | 1.9 kB 00:00 
Excluding Packages in global exclude list
Finished
Setting up Update Process
Resolving Dependencies
--> Running transaction check
---> Package clamav.i386 0:0.97.7-1.el5.rf set to be updated
---> Package clamav-db.i386 0:0.97.7-1.el5.rf set to be updated
---> Package clamd.i386 0:0.97.7-1.el5.rf set to be updated
--> Finished Dependency Resolution

Dependencies Resolved

===============================================================================================================
 Package Arch Version Repository Size
===============================================================================================================
Updating:
 clamav i386 0.97.7-1.el5.rf rpmforge 2.2 M
 clamav-db i386 0.97.7-1.el5.rf rpmforge 34 M
 clamd i386 0.97.7-1.el5.rf rpmforge 243 k

Transaction Summary
===============================================================================================================
Install 0 Package(s)
Upgrade 3 Package(s)

Total download size: 37 M
Is this ok [y/N]: y
Downloading Packages:
(1/3): clamd-0.97.7-1.el5.rf.i386.rpm | 243 kB 00:00 
(2/3): clamav-0.97.7-1.el5.rf.i386.rpm | 2.2 MB 00:00 
(3/3): clamav-db-0.97.7-1.el5.rf.i386.rpm | 34 MB 00:03 
---------------------------------------------------------------------------------------------------------------
Total 9.0 MB/s | 37 MB 00:04 
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test


Transaction Check Error:
 package clamav-db-0.97.7-1.el5.rf.i386 is already installed
 package clamd-0.97.7-1.el5.rf.i386 is already installed
 package clamav-0.97.7-1.el5.rf.i386 is already installed

Error Summary
-------------

[root@s1 ~]# 

Installed packages, according to yum list clam* are:

clamav.i386 0.97.6-1.el5.rf installed
clamav.i386 0.97.7-1.el5.rf installed
clamav-db.i386 0.97.6-1.el5.rf installed
clamav-db.i386 0.97.7-1.el5.rf installed
clamd.i386 0.97.6-1.el5.rf installed
clamd.i386 0.97.7-1.el5.rf installed
Available Packages
clamav-devel.i386 0.97.7-1.el5.rf dag 
clamav-milter.i386 0.97.7-1.el5.rf dag 
clamtk.i386 3.09-1.el5.rf dag 
clamtk.noarch 4.25-1.el5.rf dag

Why am I still seeing 0.97.6-1.el5.rf in the list?

My first guess would be that you're mixing YUM repositories. Notice that the RPM for clamav as a .rf. in its name which signifies that it's a rpmforge package. I'd confirm that clamd also is a rpmforge package and not coming from one of the other repos.

The error message is basically telling you this, saying that it can't find an appropriate package, clamd...rf....

Focus only on rpmforge repo

You can disable every repo temporarily and enable just the rpmforge repo like this:

$ yum --disablerepo=* --enablerepo=rpmforge update clam*

The above command will allow yum to do an update against just the one repo (rpmforge).

Duplicate RPMs

If you encounter duplicate versions of the clam* RPMS installed as the OP experienced the following command can be used to identify the situation:

$ yum list clam*
clamav.i386 0.97.6-1.el5.rf installed
clamav.i386 0.97.7-1.el5.rf installed
clamav-db.i386 0.97.6-1.el5.rf installed
clamav-db.i386 0.97.7-1.el5.rf installed
clamd.i386 0.97.6-1.el5.rf installed
clamd.i386 0.97.7-1.el5.rf 
...
...

This command will resolve that issue by removing the duplicate packages:

$ yum --disablerepo=* --enablerepo=rpmforge remove clam*-0.97.6-1.el5.rf

References

• Repositories in CentOS