yokadi: 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/yokadi - from package: yokadi

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

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