debman: 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/debman - from package: debian-goodies

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

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