roundup-admin: 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 CentOS possible default full paths are:

/usr/bin/roundup-admin - from package: roundup

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/roundup-admin - from package: roundup

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

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