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 […]

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:

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CentOS 7 – Create CentOS 7 Mirror

The tutorial below will show you how to configure a CentOS 7 server with Nginx to act as a mirror for other CentOS 7 servers. Steps First we need to update and install all the necessary packages. yum update yum install -y createrepo rsync nginx Now we need […]

Compiling and Installing Linux kernel from Source

As you many know, Kernel 4.x.x has been released with tones of changes and enhancements. We all know new kernel always have latest drivers, support for new devices, new features, filesystem enhancements.The feature that all Linux IT guys awaits for, yes it’s Live kernel patching permit a user […]