amservice: 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/amservice - from package: amanda-server

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

On Debian possible default full paths are:

/usr/sbin/amservice - from package: amanda-common

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

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