kserver: 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 Debian possible default full paths are:

/usr/sbin/kserver - from package: freewnn-kserver

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

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