testlibraw: 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/testlibraw - from package: libraw1394

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

On Debian possible default full paths are:

/usr/bin/testlibraw - from package: libraw1394-tools

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

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