tftopl: 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/tftopl - from package: texlive

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

On Debian possible default full paths are:

/usr/bin/tftopl - from package: texlive-binaries

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

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