kismet_capture: 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/kismet_capture - from package: kismet

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