czap: 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/czap - from package: dvb-apps

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

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