ghostlist.cgi: 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/server/bin/ghostlist.cgi - from package: xymon

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

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