oxref: 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 Debian possible default full paths are:

/usr/bin/oxref - from package: oxref

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