How to fix "NoValidHost: No valid host was found. There are not enough hosts available" during overcloud deployment (openstack)

How to fix

Error: NoValidHost: No valid host was found You get below error message on the console while performing an overcloud deployment from the undercloud director 2018-08-14 06:42:59Z [overcloud.Controller.0.Controller]: CREATE_FAILED  ResourceInError: resources.Controller: Went to status ERROR due to "Message: No valid host was found. There are not enough hosts available., Code: 500" 2018-08-14 06:42:59Z [overcloud.Controller.0]: CREATE_FAILED  Resource ... Read more How to fix "NoValidHost: No valid host was found. There are not enough hosts available" during overcloud deployment (openstack)

How to fix "Software selection (Source changed - please verify)"

How to fix

This is one of the most common error you will face if you are working on unattended Red Hat Linux installation where you have a customised list of Packages. Error: Solution: This error basically means that the list of rpms you planned on installation has one or many dependency issues hence the installation is halted ... Read more How to fix "Software selection (Source changed - please verify)"

Verification Failed - Error connecting to the Apple ID Server

Verification Failed - Error connecting to the Apple ID Server

Unable to connect to iCloud Server or iTunes from your laptop? I recently did an update of iTunes on my laptop after which I was unable to re-login to the iTunes with the below error Error: Verification Failed - Error connecting to the Apple ID Server Solution: This happens because your Internet Explorer is configured ... Read more Verification Failed - Error connecting to the Apple ID Server

quotacheck: Something weird happened while scanning. Error 2133571361

Explanation: Other day I was attempting to enable quota on one of my vms and I observed the quotacheck failed with above error. This error most likely means that quotacheck was unable to perform read write operation on the disk where the provided partition was mounted. Below errors are expected as seen for my case ... Read more quotacheck: Something weird happened while scanning. Error 2133571361

How to fix "mountd: refused mount request: unmatched host"

Error: On Client (192.169.32.17) # mount 192.169.32.10:/export/home/deepak /mnt mount.nfs: access denied by server while mounting 192.169.32.10:/export/home/deepak On NFS Server (192.169.32.10) # tail -n 1 /var/log/messages Sep 13 00:00:32 cc01-nds-ins rpc.mountd[29613]: refused mount request from 192.169.32.17 for /export/home/deepak (/export/home/deepak): unmatched host   Solution: This error is occurring because the NFS server is unaware of the client ... Read more How to fix "mountd: refused mount request: unmatched host"

ORA-28002: the password will expire within 6 days (certain string)

ORA-28002: the password will expire within 6 days (certain string)

I have been working in Sql developer for certain time, few days back found new notification/warning  windows is popping up with the error message - ORA-28002: the password will expire within 6 days (certain string) as below : Although there are many other ways you can get rid of this notification/warning like changing the user ... Read more ORA-28002: the password will expire within 6 days (certain string)