A “desktop” file is necessary for it.

• into the folder /usr/share/applications if the entry should be displayed for every user
• into the folder ~/local/share/applications if the application is only available for 1 user

A desktop file contents following:

[Desktop Entry]
Encoding=UTF-8
Type=Application
Name=name of the application
Name[fr_FR]=name of the application in the foreign language
Comment=comment about the application 
Comment[fr]=comment about the application in the foreign language
Exec=/path/of/the/script/of/the/application
Icon=/path/of/the/icon
Categories=GTK;Utility; 

• to get the “right” category: have a look into existing desktop files of applications of the category that you want to choose
• /usr/share/icons/oxygen/base/32×32/ is a folder that contains a lot of good icons

Sous paramètres ⇒ clavier ⇒ saisie il est possible d'activer la touche compose. Malheureusement seules les touches proposées peuvent être sélectionnées à cet effet. Voici comment activer une autre touche:

• créer dans ~/scripts un script qui “xmodmap” en se référençant à ~.xmodmap

  #!/bin/bash
  sleep 15 && xmodmap ~/.xmodmaprc
  exit 0;

  La tempo est nécessaire pour que le xmodmap soit lancé après l'ouverture complète de la session (voir Commentaire #16)

• avec la commande xev et en appuyant sur la touche à assigner pour la repérer: c'est la kexcode XX
• créer un fichier ~.xmodmaprc qui désigne la touche

  keycode 64 = Multi_key

• créer dans /usr/share/application l'entrée .desktop qui pointe sur le script:

  [Desktop Entry]
  Encoding=UTF-8
  Type=Application
  Name=activation touche compose
  Name[fr]=activation touche compose
  Comment=activation touche compose
  Comment[fr]=activation touche compose
  Exec=/home/mon_user/scripts/activation_touche_compose
  Icon=applications-utilities
  Categories=GTK;Utility;
  Name[fr_FR]=activation_touche_compose

⇒ Résultats:
- mon script est visible dans le menu des applications
- mon script fonctionne quand je le lance depuis le menu des applications
- dans l'utilitaire tweak je peux le sélectionner pour un démarrage automatique

Vérifier que l'entrée .desktop est présente dans /home/tonuser/.config/autostart/, l'ajouter le cas échéant.

Even if the auto-lock of the screen is disabled by the parameters of the screen saver, the screen get locked after inactivity.
To disable this: got to parameters ⇒ confidenciuality and disable the lock of the screen.

Target: get the full path of the files (/folder/sub-folder/file) in the bar of nautilus.

• only 1 time: Simply press Strg and l
  To return to the original breadcrumb view, make sure that the editable text area has the focus then press the Esc key.
  
  
• To make it permanent type:

  gsettings set org.gnome.nautilus.preferences always-use-location-entry true

Source

Source

• install the module gnome-shell-integration into firefox (modules ⇒ extensions)
• install the second part of the module:

  # dnf copr enable region51/chrome-gnome-shell
  # dnf install chrome-gnome-shell 

For extensions about the system monitoring on my “KCN”-PC:

# dnf install NetworkManager-glib-devel libgtop2-devel

To make the client Nextcloud able to store the passwords into the gnome-keyring, make sure that boths rpms libgnome-keyring and gnome-keyring are instaled.

Source: https://blog.drsolly.com/2018/05/upgrading-to-fedora-28.html
I prefer put the desktop file into /usr/shrare/applications/ and give each user the possibility to activate it via gnome-tweak ⇒ autostart:

• # dnf install nemo

• # nano /usr/share/applications/activation_nemo_AG.desktop

• and enter in it:

   [Desktop Entry]
  Type=Application
  Name=Nemo
  Comment=Start Nemo desktop at log in
  Exec=nemo-desktop
  OnlyShowIn=GNOME;
  AutostartCondition=GSettings org.nemo.desktop show-desktop-icons
  X-GNOME-AutoRestart=true
  Icon=/usr/share/icons/gnome/32x32/apps/preferences-desktop-wallpaper.png
  Categories=GTK;Utility;
  Name[fr_FR]=nemo-autostart-with-gnome 

• the activation should be visible into the menu of applications
• select for autostart via gnome-tweak

# dnf install xscreensaver