findrule: 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/findrule - from package: perl-File-Find-Rule

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

On Debian possible default full paths are:

/usr/bin/findrule - from package: libfile-find-rule-perl

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

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