cyrx: 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/cyrx - from package: keyboards-rg

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