msp430-as: 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/msp430-as - from package: binutils-msp430

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

Error in other languages:
msp430-as: bevel nie gevind nie
msp430-as: comandă negăsită
msp430-as: comando não encontrado
msp430-as: commande introuvable
msp430-as: command not found
msp430-as: käsku ei ole
msp430-as: không tìm thấy lệnh
msp430-as: komanda nerasta
msp430-as: Kommando nicht gefunden.
msp430-as: kommandot finns inte
msp430-as: komut yok
msp430-as: nie znaleziono polecenia
msp430-as: níor aimsíodh an t-ordú
msp430-as: no se encontró la orden
msp430-as: no s'ha trobat l'ordre
msp430-as: opdracht niet gevonden
msp430-as: parancs nem található
msp430-as: perintah tidak ditemukan
msp430-as: príkaz nenájdený
msp430-as: příkaz nenalezen
msp430-as: команда не найдена
msp430-as: командата не е открита
msp430-as: 命令找不到
msp430-as: コマンドが見つかりません