Update cheatsheets

linux/zenity

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# zenity
+
+> Display dialogs from the command-line/shell scripts.
+> Return user-inserted values or 1 if error.
+> More information: <https://manned.org/zenity>.
+
+- Display the default question dialog:
+
+`zenity --question`
+
+- Display an info dialog displaying the text "Hello!":
+
+`zenity --info --text="{{Hello!}}"`
+
+- Display a name/password form and output the data separated by ";":
+
+`zenity --forms --add-entry="{{Name}}" --add-password="{{Password}}" --separator="{{;}}"`
+
+- Display a file selection form in which the user can only select directories:
+
+`zenity --file-selection --directory`
+
+- Display a progress bar which updates its message every second and show a progress percent:
+
+`{{(echo "#1"; sleep 1; echo "50"; echo "#2"; sleep 1; echo "100")}} | zenity --progress`