How can I found system log

I’m developing on EX2100 and DL2100. When I tried to install an app I made, it showed you “Failed to install app” without any failure reason, so I cloud not resolve it. Then I logged in through SSH, checked files in /var/log and other place of the file system, but didn’t find any system log file about app installation error.

The app I created is as same as the official demo.
http://developer.mycloud.com/MCDSDKgettingstarted.html

You may want to post your question to the dedicated forums for the EX2 and DL series devices. This subsection is primarily for the single bay My Cloud devices.

https://community.wd.com/c/network-attached-storage/wd-my-cloud-ex2
https://community.wd.com/c/network-attached-storage/my-cloud-business-series

Thanks

If you go to the “?” at the top right of the web ui, there should be a support option where you can generate and save the log files (which is what tech support will tell you to do should you have any issues)