Sometimes, when I installed the Oracle GI and run the asmca, I could create volume and acfs easily, while I never know the background of such things. This time, I need to create a shared cluster files...

I got this issue last afternoon and fixed it this noon, so maybe it could help others. Some people prefer to install the RHEL on their servers while do not want to purchase the service, so to get upda...

Several days ago I installed a Ubuntu 18.10 on a machine already installed a Windows 10. At the beginning I thought such task could be finished easily in half hour, and I installed it smoothly until I...

These days I am reading the book 'Advanced Bash-Scripting Guide' and I got confused about '&&' and '-a'. The related part was here: [ 1 -eq 1 ] && [ -n "`echo true 1>&2`" ] # tr...

My friend got this issue and wanted to know the reason, so I built a test VM to verify it. The dbss scirpt was used to start their instances and he found if he run 'dbss start' then he could get the c...

This night I installed an Oracle 12c database on SLES12SP3 to test the dbss script on SLES system and found it worked well until I rebooted the server. After the reboot, I found the database was not o...

To start/stop all the instances on a server, I created a script named dbss (database start/stop) and it worked well on AIX, RHEL5/6 and SLES11, while I found it could not work on RHEL7/SLES12 with sys...

Several days ago I encountered this little issue and I found it was very interesting. :) I got a capacity issue and when I run 'du -sh *' I got error message similar with below: root@debian:/tmp# du -...

When I install the Grid Infrastructure(GI), usually I need to configure the udev rule for the storage devices to get a persistent device names and set the right owner, group and permissions on them fo...

Last night when I made partitions of one large 3T flash disk, I got some issues with the parted command. The flash disk would be used as an Oracle ASM disk, so I preferred to split it to two partition...