mount.fedfs: 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:

/sbin/mount.fedfs - from package: fedfs-utils-client

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

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