raw-identify: 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/raw-identify - from package: LibRaw-samples

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

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