rt-migrate-test: 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/rt-migrate-test - from package: rt-tests

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

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