How to adjust the file opening mode in Linux

Article Title: how to adjust the file opening mode in Linux. Linux is a technology channel of the IT lab in China. Including desktop applications, Linux system management, kernel research, embedded systems and open source, and other basic categories in Gnome's file manager (nautilus), double-click a file, the system automatically calls the corresponding program to open the file. In Nautilus, you can modify the default open mode by right-clicking the menu, but it lacks flexibility and operability. For example, you cannot delete open methods of some candidates or add open methods in batches.
　
The configuration of how GNMOE is opened involves the following directories and files:
　
/Usr/share/applications
　
~ /. Local/share/applications
　
/Usr/share/applications/mimeinfo. cache
　
~ /. Local/share/applications/mimeinfo. cache
　
Check these directories and you will find a lot. Desktop is a file with a suffix.
　
In general,/etc/gnome/defaults. list stores the global open mode;
　
~ /. Local/share/applications/defaults. list stores the personal open mode. When the two are inconsistent, local personal settings are preferred.
　
~ /. Local/share/applications
　
/Usr/share/applications
　
These two are local desktop items and global desktop items respectively.
　
/Usr/share/applications/mimeinfo. cache
　
~ /. Local/share/applications/mimeinfo. cache
　
The two are global and partial open mode caches. You can delete or change the order here to delete some open mode or modify the default open mode.
　
The structure of/usr/share/applications/defaults. list is as follows:
　
Program type/file type = the item for opening the file; [item 2;]… [Item n;]
　
Candidate open methods can be separated by commas (,) without leaving other characters
　
To modify the file opening method, you must first determine the file type.
　
For example, if a plain text file is opened in plain mode, the candidate for vim. desktop is firefox. desktop by default.
　
Text/plain = vim. desktop; firefox. desktop
　
You can edit it directly.
　
~ /. Local/share/applications/defaults. list
　
After editing, manually modify
　
/Usr/share/applications/mimeinfo. cache
　
~ /. Local/share/applications/mimeinfo. cache
　
These two cache files.
　
Next, let's take a look at the structure of the desktop file.
　
[Desktop Entry]
　
Encoding = UTF-8 // character Encoding
　
Name = vim // real Name
　
MimeType = text/plain; // type
　
Exec = vim % f // The running program % f represents a parameter
　
Type = Application // Type
　
Terminal = true // whether to use the Terminal
　
NoDisplay = true // whether it is displayed in the gnome menu