rtin: 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/rtin - from package: tin

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

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