ganesha-admin: 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/bin/ganesha-admin - from package: nfs-ganesha-utils

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

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