wifite: 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/wifite - from package: wifite

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

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