amr: 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/amr - from package: acr

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

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