ltpcounter: 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/ltpcounter - from package: ion

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

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