growisofs: 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 CentOS possible default full paths are:

/usr/bin/growisofs - from package: dvd+rw-tools

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/growisofs - from package: growisofs

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

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