Handled a ntp issue these days and I want to share my learning here as I could not find the right an...
Xntpd restarted due to no time server selected
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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 '&&...
‘lsnrctl status’ could not display the status of running listener correctly
My friend got this issue and wanted to know the reason, so I built a test VM to verify it. The dbss ...
ORA-12547 and sysctl -p
This night I installed an Oracle 12c database on SLES12SP3 to test the dbss script on SLES system an...
Systemd service was terminated abnormally during reboot
To start/stop all the instances on a server, I created a script named dbss (database start/stop) and...
