wapbox: 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/sbin/wapbox - from package: kannel

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