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rhel7: Message “Error calling StartServiceByName for org.freedesktop.PolicyKit1: Timeout was reached” is coming on system after setting the hostname

hostnamectl set-hostname <hostname> Error getting authority: Error initializing authority: Error calling StartServiceByName for org.freedesktop.PolicyKit1: Timeout was reached (g-io-error-quark, 24) Also other commands fail:

[root@rhel7u2a ~]# systemctl restart sshd Error getting authority: Error initializing authority: Error calling StartServiceByName for org.freedesktop.PolicyKit1: GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Activation of org.freedesktop.PolicyKit1 timed out (g-dbus-error-quark, 20) [root@rhel7u2a ~] # Resolution The permissions should be […]

NFSv4 mounts show “nobody” as owner and group on a RHEL 6 client

Issue

On Red Hat Enterprise Linux a NFS mounted share shows “nobody” as the owner and groupowner of all the files and directory. Resolution Create the same user on the Server and Client Use a centralized namespace like LDAP domain, NIS, Active Directory etc Root Cause

The observed behavior is an expected and intended behavior […]

XFS Filesystem has duplicate UUID problem Administration

XFS Filesystem has duplicate UUID problem Administration If you can not mount your XFS partition with classical wrong fs type, bad superblock etc. error and you see a message in kernel logs (dmesg) like that:

XFS: Filesystem sdb7 has duplicate UUID – can’t mount you can still mount the filesystem with nouuid options as below:

[…]