Update cheatsheets

linux/whiptail

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# whiptail
+
+> Display text-based dialog boxes from shell scripts.
+> More information: <https://manned.org/whiptail>.
+
+- Display a simple message:
+
+`whiptail --title "{{title}}" --msgbox "{{message}}" {{height_in_chars}} {{width_in_chars}}`
+
+- Display a boolean choice, returning the result through the exit code:
+
+`whiptail --title "{{title}}" --yesno "{{message}}" {{height_in_chars}} {{width_in_chars}}`
+
+- Customise the text on the yes/no buttons:
+
+`whiptail --title "{{title}}" --yes-button "{{text}}" --no-button "{{text}}" --yesno "{{message}}" {{height_in_chars}} {{width_in_chars}}`
+
+- Display a text input box:
+
+`{{result_variable_name}}="$(whiptail --title "{{title}}" --inputbox "{{message}}" {{height_in_chars}} {{width_in_chars}} {{default_text}} 3>&1 1>&2 2>&3)"`
+
+- Display a password input box:
+
+`{{result_variable_name}}="$(whiptail --title "{{title}}" --passwordbox "{{message}}" {{height_in_chars}} {{width_in_chars}} 3>&1 1>&2 2>&3)"`
+
+- Display a multiple-choice menu:
+
+`{{result_variable_name}}=$(whiptail --title "{{title}}" --menu "{{message}}" {{height_in_chars}} {{width_in_chars}} {{menu_display_height}} "{{value_1}}" "{{display_text_1}}" "{{value_n}}" "{{display_text_n}}" ..... 3>&1 1>&2 2>&3)`