Linux – Page 2 – Database & Cloud

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 beginning I thought such task could be finished easily in half hour, and I installed it smoothly unti...

28/10/2018Linux1,197 viewsComments

fatal: DH_GEX_REQUEST, bad parameters: 2048 !< 1024 !< 8192

These days got an issue that some AIX servers could not access one Linux server: ------@------:/home/------/.ssh$ssh 192.168.3.66 Connection closed by 192.168.3.66 (I removed the hostname and usern...

24/03/2018Linux1,132 viewsComments

‘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 scirpt was used to start their instances and he found if he run 'dbss start' then he could get th...

11/06/2018Linux1,101 views1

Some nodes failed to boot after kernel batch upgrade

Today my friend upgraded some nodes and a small part of them failed to boot after the upgrade.He checked such systems and reinstall the new installed kernel, then reboot them and we could enter th...

10/03/2020Linux978 viewsComments

CIFS VFS: No response to cmd

I never thought mounting a shared filesystem maybe cause server reboot!One node in a three-node RAC database was rebooted without any reason, and I was contacted to find the possible reason.I ...

28/01/2018Linux819 viewsComments

du: option requires an argument — ‘X’

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# ...

03/06/2018Linux601 viewsComments

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 a shell script. We failed to update part of them and after I fixed the failure I would like to share...

19/10/2019Linux503 viewsComments

Add space to the Synology NAS in the VM

I have finished similar tasks more than three times, so I though I would better write down it so in the future I could have a reference and just need to follow it step by step.Below steps only tes...

31/12/2017427 viewsComments

Some strange behaviours of parted

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 partit...

16/05/2018Linux401 viewsComments

Was scared just now — extend the partition

Have to say, these days I should be more careful when I dealt with any problem.I have extended many partitions in the past, including the real environment or in my VMs. And I also know this is a v...

25/04/2017Linux378 viewsComments

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