maskambignuc: 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/maskambignuc - from package: emboss

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

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