ksplashsimple: 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/ksplashsimple - from package: kdebase-workspace

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

On Debian possible default full paths are:

/usr/bin/ksplashsimple - from package: kde-workspace-bin

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

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