gnu.txt: 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/lib/ace/bin/MakeProjectCreator/docs/templates/gnu.txt - from package: mpc-ace

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

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