ebbx: 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/ebbx - from package: dvipdfmx

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