randomdata: 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/share/circos/tools/randomdata/bin/randomdata - from package: circos-tools

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

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