lt-proc: 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/lt-proc - from package: lttoolbox

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

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