tilestache-render: 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/tilestache-render - from package: tilestache

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