rafind2: 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/rafind2 - from package: radare2

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

Error in other languages:
rafind2: bevel nie gevind nie
rafind2: comandă negăsită
rafind2: comando não encontrado
rafind2: commande introuvable
rafind2: command not found
rafind2: käsku ei ole
rafind2: không tìm thấy lệnh
rafind2: komanda nerasta
rafind2: Kommando nicht gefunden.
rafind2: kommandot finns inte
rafind2: komut yok
rafind2: nie znaleziono polecenia
rafind2: níor aimsíodh an t-ordú
rafind2: no se encontró la orden
rafind2: no s'ha trobat l'ordre
rafind2: opdracht niet gevonden
rafind2: parancs nem található
rafind2: perintah tidak ditemukan
rafind2: príkaz nenájdený
rafind2: příkaz nenalezen
rafind2: команда не найдена
rafind2: командата не е открита
rafind2: 命令找不到
rafind2: コマンドが見つかりません