kxc-cryptsetup: 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/kxc-cryptsetup - from package: kxc

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

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