wwt: 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 Debian possible default full paths are:

/usr/bin/wwt - from package: wit

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

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