gatherd: 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 CentOS possible default full paths are:

/usr/sbin/gatherd - from package: sblim-gather

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

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