textqdacco: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/textqdacco - from package: qdacco

You may install the required package with command apt-get install {package}
Error in other languages:
textqdacco: bevel nie gevind nie
textqdacco: comandă negăsită
textqdacco: comando não encontrado
textqdacco: commande introuvable
textqdacco: command not found
textqdacco: käsku ei ole
textqdacco: không tìm thấy lệnh
textqdacco: komanda nerasta
textqdacco: Kommando nicht gefunden.
textqdacco: kommandot finns inte
textqdacco: komut yok
textqdacco: nie znaleziono polecenia
textqdacco: níor aimsíodh an t-ordú
textqdacco: no se encontró la orden
textqdacco: no s'ha trobat l'ordre
textqdacco: opdracht niet gevonden
textqdacco: parancs nem található
textqdacco: perintah tidak ditemukan
textqdacco: príkaz nenájdený
textqdacco: příkaz nenalezen
textqdacco: команда не найдена
textqdacco: командата не е открита
textqdacco: 命令找不到
textqdacco: コマンドが見つかりません