filter_mysqlbinlog: 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

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/filter_mysqlbinlog - from package: mha4mysql-node

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