Yum-y update has been used in a variety of scenarios to solve the problem.

Yum-y update has been developing for a long time. Here I will share my personal understanding. Here I will talk about yum-y update.

When yum-y update is used today to update the Linux CentOS 5.1 system installed on the host security module, half of the update suddenly stops. when yum-y update is used again in the future, the update cannot be performed, and the following updates always appear:

 
 

  
  
#yum -y update  
  
  
Loading "installonlyn" plugin  
  
  
Setting up Update Process  
  
  
Setting up repositories  
  
  
Reading repository metadata in from local files  
  
  
Traceback (most recent call last):  
  
  
 File "/usr/bin/yum", line 29, in ?  
  
  
   yummain.main(sys.argv[1:])  
  
  
 File "/usr/share/yum-cli/yummain.py", line 94, in main  
  
  
   result, resultmsgs = base.doCommands()  
  
  
 File "/usr/share/yum-cli/cli.py", line 381, in doCommands  
  
  
   return self.yum_cli_commands[self.basecmd].doCommand(self, self.basecmd, self.extcmds)  
  
  
 File "/usr/share/yum-cli/yumcommands.py", line 150, in doCommand  
  
  
   return base.updatePkgs(extcmds)  
  
  
 File "/usr/share/yum-cli/cli.py", line 673, in updatePkgs  
  
  
   self.doRepoSetup()  
  
  
 File "/usr/share/yum-cli/cli.py", line 109, in doRepoSetup  
  
  
   self.doSackSetup(thisrepothisrepo=thisrepo)  
  
  
 File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 341, in doSackSetup  
  
  
   self.pkgSack.excludeArchs(archlist)  
  
  
 File "/usr/lib/python2.4/site-packages/yum/packageSack.py", line 331, in excludeArchs  
  
  
   sack.excludeArchs(archlist)  
  
  
 File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 589, in excludeArchs  
  
  
   obj = self.pc(rep,self.db2class(x))  
  
  
 File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 431, in db2class  
  
  
   y.checksum = {'pkgid': 'YES','type': db.checksum_type,   
  
  
 File "/usr/lib/python2.4/site-packages/sqlite/main.py", line 97, in __getattr__  
  
  
   raise AttributeError, key  
  
  
AttributeError: CHECKSUM_VALUE 
 
 

I thought, it's really bad. How should I do this... yum clean all cannot be used to solve the problem. After a hundred attempts, the following solutions have been completed:

 
 

  
  
#rpm -qa | grep yum-metadata-parser 
 
 

The following results are obtained:

 
 

  
  
yum-metadata-parser-1.1.2-2.el5  
  
  
yum-metadata-parser-1.0-8.fc6 
 
 

It is strange how there are two security issues, which must be caused by the incomplete security after the computer, and this suite is a question of appeal, so remove the two suites first.

 
 

  
  
#rpm -ev --nodeps yum-metadata-parser-1.1.2-2.el5  
  
  
#rpm -ev --nodeps yum-metadata-parser-1.0-8.fc6 
 
 

There are two ways to remove the yum-metadata-parser-1.1.2-2.el5 security back:
Method 1:

1. # Yum insatll yum-metadata-parser) 

Method 2:

 
 

  
  
#wget http://ftp.cse.yzu.edu.tw/pub/CentOS/5.2/os/i386/CentOS/yum-metadata-parser-1.1.2-2.el5.i386.rpm  
  
  
#rpm -iv yum-metadata-parser-1.1.2-2.el5.i386.rpm 
 
 

After yum-metadata-parser is installed, use yum-y update to update the data. The above problem is no longer displayed ..

1. Update list of Linux yum installation package
2. CentOS yum Server Installation and use commands
3. Linux yum powerful basic operations
4. Fedora Yum command to query software packages and clear Cache
5. Configure Linux YUM source settings to use a proxy