swfextract: 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/swfextract - from package: swftools

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

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