ccrypt: 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/ccrypt - from package: ccrypt

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

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