ttl2c: 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/ttl2c - from package: lvtk-tools

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

Error in other languages:
ttl2c: bevel nie gevind nie
ttl2c: comandă negăsită
ttl2c: comando não encontrado
ttl2c: commande introuvable
ttl2c: command not found
ttl2c: käsku ei ole
ttl2c: không tìm thấy lệnh
ttl2c: komanda nerasta
ttl2c: Kommando nicht gefunden.
ttl2c: kommandot finns inte
ttl2c: komut yok
ttl2c: nie znaleziono polecenia
ttl2c: níor aimsíodh an t-ordú
ttl2c: no se encontró la orden
ttl2c: no s'ha trobat l'ordre
ttl2c: opdracht niet gevonden
ttl2c: parancs nem található
ttl2c: perintah tidak ditemukan
ttl2c: príkaz nenájdený
ttl2c: příkaz nenalezen
ttl2c: команда не найдена
ttl2c: командата не е открита
ttl2c: 命令找不到
ttl2c: コマンドが見つかりません