gistfile1.txt

#!/bin/bash
TMPFCMD="/tmp/cmd.tmp"

dialog --title 'Execute command' --menu 'Chose program to launch:' 0 0 0 \
l 'ls -la' \
p pwd \
d date \
u 'uname -a' \
w whoami 2> $TMPFCMD
CMD2RUN=$(cat $TMPFCMD)

if [ "$?" -eq "0" ]; then
 case "$CMD2RUN" in
  "l")
  ls -la
  command="ls -la"
  ;;
  "p")
  pwd
  command="pwd"
  ;;
  "d")
  date
  command="date"
  ;;
  "u")
  uname -a
  command="uname -a"
  ;;
  "w")
  whoami
  command="whoami"
  ;;
 esac
fi

echo $command

rm -f $TMPFCMD