roundup-ctl: 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/roundup-ctl - from package: roundup

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