Unable to upgrade Plesk 12.0 to 12.5:
Attempt to remove 'shm' to resolve conflict has failed shm-12.5.30-rhel5.build1205150826.19.x86_64 from PLESK_12_5_30-dist has depsolving problems --> shm conflicts with psa psa-12.5.30-rhel5.build1205150826.19.x86_64 from PLESK_12_5_30-dist has depsolving problems --> psa conflicts with shm Exception: Failed to solve dependencies: shm conflicts with psa psa conflicts with shm
plesk-service-node-agent package is installed, but not required in Plesk 12.0 distribution.
In Plesk 12.5 this package requires
shmthat conflicts with Plesk.
Find exact package name:
# rpm -qa | grep plesk-service-node-agent
Remove the package:
# rpm -e plesk-service-node-agent-12.0.18-rhel5.build1200140606.15
Try to upgrade Plesk again