make_tutorial_images: 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

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/maketutorialimages/bin/make_tutorial_images - from package: circos-tools

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