imc-pkexec: 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/imc-pkexec - from package: italc-management-console

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

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