ndmetis64: command not found

Have You tried accessing the binary with the full path?

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/ndmetis64 - from package: metis64

You may install the required package with command yum install {package}
Error in other languages:
ndmetis64: bevel nie gevind nie
ndmetis64: comandă negăsită
ndmetis64: comando não encontrado
ndmetis64: commande introuvable
ndmetis64: command not found
ndmetis64: käsku ei ole
ndmetis64: không tìm thấy lệnh
ndmetis64: komanda nerasta
ndmetis64: Kommando nicht gefunden.
ndmetis64: kommandot finns inte
ndmetis64: komut yok
ndmetis64: nie znaleziono polecenia
ndmetis64: níor aimsíodh an t-ordú
ndmetis64: no se encontró la orden
ndmetis64: no s'ha trobat l'ordre
ndmetis64: opdracht niet gevonden
ndmetis64: parancs nem található
ndmetis64: perintah tidak ditemukan
ndmetis64: príkaz nenájdený
ndmetis64: příkaz nenalezen
ndmetis64: команда не найдена
ndmetis64: командата не е открита
ndmetis64: 命令找不到
ndmetis64: コマンドが見つかりません