This was another issue happened several days ago. In our email configuration, there was one central email server to sent email out and all other servers transferred email to this central email server,...

These days got a sendmail issue and fixed it after some research and tests, and I though it could be shared here. The primary email server was 192.168.3.40 and was used as relay server to send email t...

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 username...

Several days ago, I run 'yum update' while failed: error: Couldn't fork %pre(php71u-fpm-7.1.14-1.ius.centos6.x86_64): Cannot allocate memory Error in PREIN scriptlet in rpm package php71u-fpm-7.1.14-1...

Transmission released new version 2.93 already, while I still could not find the upgraded version in the SynoCommunity repository. The current 2.92 version has one issue on my system that it causes me...

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 checke...

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 tested...

I did not know why my NAS said one of the Basic volumes as 'Crashed' and I could not write files to it. At the beginning I though it should be easy task so I logged the system through SSH directly and...

When I changed my domain name, I planed three subdomains for the future usage: www, blogs and wiki, while unfortunately at that time only the blogs.dbcloudsvc.com had some contents and in fact it was ...

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 very...