tpl2tt2.pl: 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/share/sympa/bin/tpl2tt2.pl - from package: sympa

You may install the required package with command apt-get install {package}
Error in other languages:
tpl2tt2.pl: bevel nie gevind nie
tpl2tt2.pl: comandă negăsită
tpl2tt2.pl: comando não encontrado
tpl2tt2.pl: commande introuvable
tpl2tt2.pl: command not found
tpl2tt2.pl: käsku ei ole
tpl2tt2.pl: không tìm thấy lệnh
tpl2tt2.pl: komanda nerasta
tpl2tt2.pl: Kommando nicht gefunden.
tpl2tt2.pl: kommandot finns inte
tpl2tt2.pl: komut yok
tpl2tt2.pl: nie znaleziono polecenia
tpl2tt2.pl: níor aimsíodh an t-ordú
tpl2tt2.pl: no se encontró la orden
tpl2tt2.pl: no s'ha trobat l'ordre
tpl2tt2.pl: opdracht niet gevonden
tpl2tt2.pl: parancs nem található
tpl2tt2.pl: perintah tidak ditemukan
tpl2tt2.pl: príkaz nenájdený
tpl2tt2.pl: příkaz nenalezen
tpl2tt2.pl: команда не найдена
tpl2tt2.pl: командата не е открита
tpl2tt2.pl: 命令找不到
tpl2tt2.pl: コマンドが見つかりません