waei: 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/waei - from package: gwaei

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