tcptraceroute.mt: 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/tcptraceroute.mt - from package: tcptraceroute

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

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