krandom.kss: command not found

Have You tried accessing the binary with the full path?

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/krandom.kss - from package: kdebase-workspace

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

On Debian possible default full paths are:

/usr/bin/krandom.kss - from package: kde-workspace-bin

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