rpm -q --queryformat '%{INSTALLTIME:date}\n' {PACKAGE_NAME}
Example:
rpm -q --queryformat '%{INSTALLTIME:date}\n' ers-agentportal
Mon Nov 7 16:02:32 2022
yum history list {PACKAGE_NAME}
yum --showduplicates list {PACKAGE_NAME}
yum versionlock {PACKAGE_NAME}
# Example
yum versionlock ers-agentportal
Adding versionlock on: 0:ers-agentportal-2.135.0-4587.bugfix_dynamicVoucherNegativeBalance.SNAPSHOT
versionlock added: 1
# Trying to be mischevious
yum downgrade ers-agentportal
Loaded plugins: fastestmirror, langpacks, versionlock
Loading mirror speeds from cached hostfile
byob | 2.9 kB 00:00:00
epel | 2.9 kB 00:00:00
ers_prod | 2.9 kB 00:00:00
Nothing to do
# Removing the Version Lock
yum versionlock delete 0:*
Deleting versionlock for: 0:ers-agentportal-2.135.0-4587.bugfix_dynamicVoucherNegativeBalance.SNAPSHOT.*
versionlock deleted: 1