clxdo: 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/clxdo - from package: mcl

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