ttfautohint: 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

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/ttfautohint - from package: ttfautohint

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