chkconfig: 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:

/sbin/chkconfig - from package: chkconfig

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

On Debian possible default full paths are:

/sbin/chkconfig - from package: chkconfig

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

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