aicasm: 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

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/aicasm - from package: freebsd-buildutils

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