Software development & sys admin

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Top 12 java tips and tricks

The idea here is not to remake the books “97 things every programmer…”It is rather a non-exhaustive list of things that are not necessarily said when you learn java and that deserve to be looked at to improve: Java optimises… Continue Reading →

ORA-00600: internal error code, arguments: [kqd-objerror$], …

Do you have this kind of error message ? It means that one or more object is invalid. And in the error message you have the object name causing this error and then you can find the ids of instances… Continue Reading →

==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ====

You are on a CentOS server, connected as a non-root user, for example here as the user owner of the tomcat installation folder, let’s call it mytomcatuser. And when you want to stop tomcat using the systemd tomcat.service then you… Continue Reading →

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