tpp: 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/bin/tpp - from package: tpp

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

On Debian possible default full paths are:

/usr/bin/tpp - from package: tpp

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

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