untoast: command not found

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 CentOS possible default full paths are:

/usr/bin/untoast - from package: gsm-tools

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/untoast - from package: libgsm-tools

You may install the required package with command apt-get install {package}

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