macof: 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 CentOS possible default full paths are:

/usr/sbin/macof - from package: dsniff

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/sbin/macof - from package: dsniff

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

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