ltpmeter: 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/ltpmeter - from package: ion

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

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