fence_ldom: 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/fence_ldom - from package: fence-agents

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

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