cooktime: 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/cooktime - from package: cook

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

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