t2n: 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/t2n - from package: t2n

You may install the required package with command apt-get install {package}
Error in other languages:
t2n: bevel nie gevind nie
t2n: comandă negăsită
t2n: comando não encontrado
t2n: commande introuvable
t2n: command not found
t2n: käsku ei ole
t2n: không tìm thấy lệnh
t2n: komanda nerasta
t2n: Kommando nicht gefunden.
t2n: kommandot finns inte
t2n: komut yok
t2n: nie znaleziono polecenia
t2n: níor aimsíodh an t-ordú
t2n: no se encontró la orden
t2n: no s'ha trobat l'ordre
t2n: opdracht niet gevonden
t2n: parancs nem található
t2n: perintah tidak ditemukan
t2n: príkaz nenájdený
t2n: příkaz nenalezen
t2n: команда не найдена
t2n: командата не е открита
t2n: 命令找不到
t2n: コマンドが見つかりません