fedfs-delete-replication: 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/fedfs-delete-replication - from package: fedfs-utils-admin

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

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