xsup_ntpwdhash: 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/xsup_ntpwdhash - from package: xsupplicant

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

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