ufl2py: 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/ufl2py - from package: python-ufl

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

Error in other languages:
ufl2py: bevel nie gevind nie
ufl2py: comandă negăsită
ufl2py: comando não encontrado
ufl2py: commande introuvable
ufl2py: command not found
ufl2py: käsku ei ole
ufl2py: không tìm thấy lệnh
ufl2py: komanda nerasta
ufl2py: Kommando nicht gefunden.
ufl2py: kommandot finns inte
ufl2py: komut yok
ufl2py: nie znaleziono polecenia
ufl2py: níor aimsíodh an t-ordú
ufl2py: no se encontró la orden
ufl2py: no s'ha trobat l'ordre
ufl2py: opdracht niet gevonden
ufl2py: parancs nem található
ufl2py: perintah tidak ditemukan
ufl2py: príkaz nenájdený
ufl2py: příkaz nenalezen
ufl2py: команда не найдена
ufl2py: командата не е открита
ufl2py: 命令找不到
ufl2py: コマンドが見つかりません