rsyncrypto: 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/rsyncrypto - from package: rsyncrypto

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

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