sm-notify: 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/sm-notify - from package: nfs-utils

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

On Debian possible default full paths are:

/sbin/sm-notify - from package: nfs-common

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

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