kfourinlineproc: 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/kfourinlineproc - from package: kdegames

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

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