amsn-remote: 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 Debian possible default full paths are:

/usr/bin/amsn-remote - from package: amsn

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

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