sfnt2woff: 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/sfnt2woff - from package: woff-tools

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

Error in other languages:
sfnt2woff: bevel nie gevind nie
sfnt2woff: comandă negăsită
sfnt2woff: comando não encontrado
sfnt2woff: commande introuvable
sfnt2woff: command not found
sfnt2woff: käsku ei ole
sfnt2woff: không tìm thấy lệnh
sfnt2woff: komanda nerasta
sfnt2woff: Kommando nicht gefunden.
sfnt2woff: kommandot finns inte
sfnt2woff: komut yok
sfnt2woff: nie znaleziono polecenia
sfnt2woff: níor aimsíodh an t-ordú
sfnt2woff: no se encontró la orden
sfnt2woff: no s'ha trobat l'ordre
sfnt2woff: opdracht niet gevonden
sfnt2woff: parancs nem található
sfnt2woff: perintah tidak ditemukan
sfnt2woff: príkaz nenájdený
sfnt2woff: příkaz nenalezen
sfnt2woff: команда не найдена
sfnt2woff: командата не е открита
sfnt2woff: 命令找不到
sfnt2woff: コマンドが見つかりません