pwman3: 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/pwman3 - from package: pwman3

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

Error in other languages:
pwman3: bevel nie gevind nie
pwman3: comandă negăsită
pwman3: comando não encontrado
pwman3: commande introuvable
pwman3: command not found
pwman3: käsku ei ole
pwman3: không tìm thấy lệnh
pwman3: komanda nerasta
pwman3: Kommando nicht gefunden.
pwman3: kommandot finns inte
pwman3: komut yok
pwman3: nie znaleziono polecenia
pwman3: níor aimsíodh an t-ordú
pwman3: no se encontró la orden
pwman3: no s'ha trobat l'ordre
pwman3: opdracht niet gevonden
pwman3: parancs nem található
pwman3: perintah tidak ditemukan
pwman3: príkaz nenájdený
pwman3: příkaz nenalezen
pwman3: команда не найдена
pwman3: командата не е открита
pwman3: 命令找不到
pwman3: コマンドが見つかりません