canonicalize_bgp.pl.gz: 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/share/doc/libattean-perl/examples/bin/canonicalize_bgp.pl.gz - from package: libattean-perl

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

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