j2d: 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/j2d - from package: jday

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

Error in other languages:
j2d: bevel nie gevind nie
j2d: comandă negăsită
j2d: comando não encontrado
j2d: commande introuvable
j2d: command not found
j2d: käsku ei ole
j2d: không tìm thấy lệnh
j2d: komanda nerasta
j2d: Kommando nicht gefunden.
j2d: kommandot finns inte
j2d: komut yok
j2d: nie znaleziono polecenia
j2d: níor aimsíodh an t-ordú
j2d: no se encontró la orden
j2d: no s'ha trobat l'ordre
j2d: opdracht niet gevonden
j2d: parancs nem található
j2d: perintah tidak ditemukan
j2d: príkaz nenájdený
j2d: příkaz nenalezen
j2d: команда не найдена
j2d: командата не е открита
j2d: 命令找不到
j2d: コマンドが見つかりません