If the web-app is called “Example” and it launches “https://www.example.com“. You will create a .desktop file as follows:

  [Desktop Entry]
  Version=1.0
  Type=Application
  Exec=epiphany --application-mode=example.desktop https://www.example.com
  Icon=example
  StartupNotify=true
  StartupWMClass=example
  Terminal=false
  Name=Example application
  Comment=A system-wide web application``

Note that the exec line includes a reference to the web app URL and to the .desktop file itself. Store the desktop file and matching icons in the usual locations, for example:

• For System-Wide:

  /usr/share/applications/example.desktop
  /usr/share/icons/hicolor/128x128/apps/example.png 

• For your own user account:

  ~/.local/share/applications/example.desktop
  ~/.local/share/icons/hicolor/128x128/apps/example.png

You can also reference local HTML files as follows: ¹⁾

  [Desktop Entry]
  Name=Fedora Developer Portal
  Comment=The developer workstation you've been waiting for.
  GenericName=Documentation
  Exec=epiphany --application-mode=fedora-developer-portal.desktop /usr/share/fedora-developer-portal/index.html
  Icon=fedora-developer-portal
  StartupWMClass=fedora-developer-portal
  Type=Application
  StartupNotify=true
  MimeType=text/plain;

The Decent Way To Reboot Frozen Kernels.

1. First, the option within the kernel needs to be turned on.
   1. sudo sh -c “echo \”1\” > /proc/sys/kernel/sysrq”
2. Then; the sequence R .. E .. K .. S .. U .. B can be typed slowly while holding ALT + SysRq

Following are the command keys available for Alt+SysRq+commandkey.²⁾

• ‘k’ – Kills all the process running on the current virtual console.
• ’s’ – This will attempt to sync all the mounted file system.
• ‘b’ – Immediately reboot the system, without unmounting partitions or syncing.
• ‘e’ – Sends SIGTERM to all process except init.
• ‘m’ – Output current memory information to the console.
• ‘i’ – Send the SIGKILL signal to all processes except init
• ‘r’ – Switch the keyboard from raw mode (the mode used by programs such as X11), to XLATE mode.
• ’s’ – sync all mounted file system.
• ‘t’ – Output a list of current tasks and their information to the console.
• ‘u’ – Remount all mounted filesystems in readonly mode.
• ‘o’ – Shutdown the system immediately.
• ‘p’ – Print the current registers and flags to the console.
• ‘0-9′ – Sets the console log level, controlling which kernel messages will be printed to your console.
• ‘f’ – Will call oom_kill to kill process which takes more memory.
• ‘h’ – Used to display the help. But any other keys than the above listed will print help.