amtterm: 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/bin/amtterm - from package: amtterm

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

On Debian possible default full paths are:

/usr/bin/amtterm - from package: amtterm

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

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