file65: 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/file65 - from package: xa

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

On Debian possible default full paths are:

/usr/bin/file65 - from package: xa65

You may install the required package with command apt-get install {package}

Error in other languages:
file65: bevel nie gevind nie
file65: comandă negăsită
file65: comando não encontrado
file65: commande introuvable
file65: command not found
file65: käsku ei ole
file65: không tìm thấy lệnh
file65: komanda nerasta
file65: Kommando nicht gefunden.
file65: kommandot finns inte
file65: komut yok
file65: nie znaleziono polecenia
file65: níor aimsíodh an t-ordú
file65: no se encontró la orden
file65: no s'ha trobat l'ordre
file65: opdracht niet gevonden
file65: parancs nem található
file65: perintah tidak ditemukan
file65: príkaz nenájdený
file65: příkaz nenalezen
file65: команда не найдена
file65: командата не е открита
file65: 命令找不到
file65: コマンドが見つかりません