hmsa: command not found

Have You tried accessing the binary with the full path?

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/hmsa - from package: hatari

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