echoping: 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/echoping - from package: echoping

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

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