oxdvi: 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/oxdvi - from package: xdvik

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