blitztest: command not found

Have You tried accessing the binary with the full path?

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/blitztest - from package: qimageblitz-examples

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

On Debian possible default full paths are:

/usr/bin/blitztest - from package: libqimageblitz-dev

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