guilt: 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 CentOS possible default full paths are:

/usr/bin/guilt - from package: guilt

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/guilt - from package: guilt

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

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