amlabel: 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/amlabel - from package: amanda-server

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

On Debian possible default full paths are:

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

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

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