pcapfix: 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/pcapfix - from package: pcapfix

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

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