pef-config: 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/sbin/pef-config - from package: freeipmi

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

On Debian possible default full paths are:

/usr/sbin/pef-config - from package: freeipmi-tools

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

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