These days I helped to troubleshoot a RedHat Cluster issue. When we run command 'service cman start'...
segfault and error 4 in libc-2.12.so
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Multiple version issue of glibc-common package on RHEL systems
These days we are doing some maintenance tasks on hundreds of RHEL servers and we update them using ...
How to display the obsoleted packages and versions of a RPM?
These days I patched some servers using a standard script and it run successfully on most nodes unti...
Xntpd restarted due to no time server selected
Handled a ntp issue these days and I want to share my learning here as I could not find the right an...
The difference between IP address and Hostname when creating SSH User Equivalency
I provided a 12c RAC step-by-step installation guide to client and he got issue during the deploymen...
VirtualBox VM caused system hung after laptop upgrade
In last week I upgraded my laptop from T420s to E485 to get maximum 32G memory also because the T420...
ACFS-9459 & ACFS on Oracle 11.2.0.4 and RHEL7.4
Sometimes, when I installed the Oracle GI and run the asmca, I could create volume and acfs easily, ...
LinuxCould not boot after kernel upgrade
I got this issue last afternoon and fixed it this noon, so maybe it could help others. Some people p...
Dual boot with UEFI boot mode and grub2
Several days ago I installed a Ubuntu 18.10 on a machine already installed a Windows 10. At the begi...
The difference between ‘&&’ and ‘-a’
These days I am reading the book 'Advanced Bash-Scripting Guide' and I got confused about '&&...
