bwbasic: 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/bwbasic - from package: bwbasic

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

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