sfront: command not found

Have You tried accessing the binary with the full path?

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/sfront - from package: sfront

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