README.examples: 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/doc/popularity-contest/examples/bin/README.examples - from package: popularity-contest

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