epsg_tr.py: 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 CentOS possible default full paths are:

/usr/bin/epsg_tr.py - from package: gdal-python

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/epsg_tr.py - from package: python-gdal

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

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