klauncher: 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/klauncher - from package: kdelibs3

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

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