astraceroute: 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/sbin/astraceroute - from package: netsniff-ng

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

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