boa-constructor: 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/boa-constructor - from package: boa-constructor

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

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