orcaxymon: 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/lib/xymon/client/bin/orcaxymon - from package: xymon-client

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

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