globus-xioperf: 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/globus-xioperf - from package: globus-xioperf

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

On Debian possible default full paths are:

/usr/bin/globus-xioperf - from package: globus-xioperf

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

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