raw: 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:

/bin/raw - from package: util-linux-ng

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

On Debian possible default full paths are:

/sbin/raw - from package: util-linux

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

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