问题
I previously used kate on Ubuntu 14.04 which worked quite well. After upgrading to Ubuntu 16.04, however, the tab plugin just disappeared. So if I have just a few source files opened it becomes hard to navigate between them.
How can the tab plugin for kate (v15.12.3) work again under Ubuntu 16.04?
Edit: Basically what missing is the tab control. I don't know why it's left out in the latest kate version - previously there were two tab plugins (the standard one and the multi-tab plugin which allows to configure how many lines of tab bar). Now both these plugins are not present anymore so navigating among many opened documents is a pain.
回答1:
Kate in KDE 4 indeed had two tabbar plugins as discussed here.
In Kate 5, these plugins were dropped in favor of a built-in tabbar. This built-in tabbar should be enabled by default and shows the used documents in a most recently used fashion. The tabbar shows as many tabs as fit, and of additional documents are open, then it says e.g. a "+5" to indicate there are 5 more documents that do not fit into the tabbar. You can reach these documents through Ctrl+Tab (if the tab switcher plugin is enabled), or through quick open (Ctrl+Alt+O).
If it's not visible, please try Settings > Show Tabs.
More information on Kate5's tabbar is available here and here (movable tabs).
来源：https://stackoverflow.com/questions/40315795/kate-ubuntu-16-04-does-not-have-tab-plugin