ltpclo: command not found

Have You tried accessing the binary with the full path?

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/ltpclo - from package: ion

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