Linux itself can only configure system-wide DNS by /etc/resolv.conf. Here is a way to individually set DNS for a specific process, through the mount namespace without root. You only need a simple command if use a script. Method Bubblewrap is an unprivileged (root-free) container tool. We use bwrapcommand to use it to …

We need to do two things: Decode QR code on Linux screen and print the result on terminal Convert a string to QR code on terminal, and display the QR code in the terminal for scanning Method Generating QR code qrencode is a common CLI program for generating QR codes, found in many distribution repositories. It supports …

Create "Open Terminal Here" menu for Linux file manager Some Linux GUI file managers do not have a right-click menu "Open terminal here", or some have but don't allow specifying a certain terminal. Because folder also has MIME type ( inode/directory), by associating folder with a terminal through …

Manually associate file extensions and open programs for Linux. When Linux does not recognize a certain extension, we need to create a MIME type for the extension. Linux decides opening program by MIME type, not directly file name extension. Then we associate this MIME type with a program menu item. Manual associate …