start_kdeinit: 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/start_kdeinit - from package: kdelibs3

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

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