wayv: 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/wayv - from package: wayv

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

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