apsfilter-bug: 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 Debian possible default full paths are:

/usr/bin/apsfilter-bug - from package: apsfilter

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

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