gdal_raw2geotiff: 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/gdal_raw2geotiff - from package: dans-gdal-scripts

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

Error in other languages:
gdal_raw2geotiff: bevel nie gevind nie
gdal_raw2geotiff: comandă negăsită
gdal_raw2geotiff: comando não encontrado
gdal_raw2geotiff: commande introuvable
gdal_raw2geotiff: command not found
gdal_raw2geotiff: käsku ei ole
gdal_raw2geotiff: không tìm thấy lệnh
gdal_raw2geotiff: komanda nerasta
gdal_raw2geotiff: Kommando nicht gefunden.
gdal_raw2geotiff: kommandot finns inte
gdal_raw2geotiff: komut yok
gdal_raw2geotiff: nie znaleziono polecenia
gdal_raw2geotiff: níor aimsíodh an t-ordú
gdal_raw2geotiff: no se encontró la orden
gdal_raw2geotiff: no s'ha trobat l'ordre
gdal_raw2geotiff: opdracht niet gevonden
gdal_raw2geotiff: parancs nem található
gdal_raw2geotiff: perintah tidak ditemukan
gdal_raw2geotiff: príkaz nenájdený
gdal_raw2geotiff: příkaz nenalezen
gdal_raw2geotiff: команда не найдена
gdal_raw2geotiff: командата не е открита
gdal_raw2geotiff: 命令找不到
gdal_raw2geotiff: コマンドが見つかりません