tunelp: 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 CentOS possible default full paths are:

/usr/sbin/tunelp - from package: util-linux-ng

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/sbin/tunelp - from package: util-linux

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

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