amoverview: 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/amoverview - from package: amanda-server

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

On Debian possible default full paths are:

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

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

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