italc_auth_helper: 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/italc_auth_helper - from package: italc-client

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

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