klipper: 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/klipper - from package: kdebase-workspace

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

On Debian possible default full paths are:

/usr/bin/klipper - from package: klipper

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