amreport: 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/sbin/amreport - from package: amanda-server

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

On Debian possible default full paths are:

/usr/sbin/amreport - from package: amanda-server

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

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