ksystraycmd: 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/ksystraycmd - from package: kdebase-workspace

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

On Debian possible default full paths are:

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

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

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