wapiti-cookie: command not found

Have You tried accessing the binary with the full path?

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/wapiti-cookie - from package: wapiti

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