oparchive: 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/oparchive - from package: oprofile

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

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