Thoughts about coding and books

PHP locale not working in Ubuntu

I was working with Laravel 4 and trying to format Carbon object dates according to locale. However App::setLocale(‘et_EE’) did not have any effect. Going lower level and setting setlocale(LC_ALL, ‘et_EE’) did not change locale either. Carbon uses under formatLocalized method PHP strftime so issue relates to this also. Some have suggested to use utf8_encode(strftime(“%A, %d deRead more about PHP locale not working in Ubuntu[…]

Mandatory training for every new startup – Preparing, Testing and Executing – Yrjö Ojasaar

Yrjö is one of the best experts of startups is Baltic region who I have seen personally and who keeps on speaking on different conferences. I believe that the training session what I am describing here should be wort several hundered EUR at least but this is totally free. You can skip this training only if you have launched at least one successful startup and even then it is worth repeating the basics. I am only gonna write very brief overview, to udnerstand further take your time to see these videos.

Part 1 Preparing. How to generate business idea? Is there competition and how people can survive without your invention. How to setup product hyphothesis. How to perform risk analysis. How valuable ideas can you get on toilet?
Reseources needed: people, time, motivation, money.

Read more about Mandatory training for every new startup – Preparing, Testing and Executing – Yrjö Ojasaar

How to download ca certificate chain

It might happen that some machine has missing CA chain certificates and you get error OpenSSL: error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure Unable to establish SSL connection. If accessing the specific URL in browser works without warning then you can export and download CA certificate chain In Firefox right-click > View Page Info > Security >Read more about How to download ca certificate chain[…]

Application code deployment from SVN with fast and simple rollback

Most important thing in every new release is the rollback procedure. Once you discover issues in new version then you need to be able to swithc back to previous version until you work on a fix. I have developed shell script to handle the automated deployment process and which allows quick and simple rollbacks if there are no database changes that dont allow easy rollback. Main idea is to

  • download code from SVN, GIT or similar
  • copy all code to new folder
  • replace all configuration with environment related conf
  • use symlink to switch between code versions

Here is example script that handles the automated deployment for you  Read more about Application code deployment from SVN with fast and simple rollback

Access virtualbox shared folders from Ubuntu and fix ruined ubuntu installation.

If you are running Ubuntu virtualbox guest then you cannot access the shared folder under /media/shared with regular user. However you can fix this by adding your user to vboxsf additional group.

Important! make sure you append the additional group so that other groups are not removed! Run te command below as exactly as seen and replace you username. If the permission is not applied immediately then reboot.

usermod -a -G vboxsf username

In case you forgot flag -a then it is bad but not hopeless 🙂 Read more about Access virtualbox shared folders from Ubuntu and fix ruined ubuntu installation.

Recover virtualbox guest from failing snapshot

When making snapshot of running virtualmachine guest the process got stuck and left below traces in logfile. I had to kill hte snapshot process and reboot machine to continue.

vboxmanage snapshot mymachine take initial
00:00:14.576 PCNet#0: The link is back up again after the restore.
00:03:47.980 Changing the VM state from 'RUNNING' to 'RUNNING_LS'.
00:03:48.014 
00:03:48.014 !!R0-Assertion Failed!!
00:03:48.014 Expression: <NULL>
00:03:48.014 Location  : /build/buildd/virtualbox-4.1.12-dfsg/src/VBox/VMM/VMMAll/PGMAllBth.h(1458) void pgmR0BthEPTProtSyncPageWorkerTrackDeref(PVMCPU, PPGMPOOLPAGE, RTHCPHYS, uint16_t, RTGCPHYS)
00:03:48.014 HCPhys=00000000d5a37000 wasn't found!

After  reboot i see:

# vboxmanage list vms
"<inaccessible>" {d1d42d8a-38ed-4d6d-95a1-356d2896ff26}

Read more about Recover virtualbox guest from failing snapshot

sh: 2: Syntax error: newline unexpected

Error happened when running perl script on Ubuntu machine after coping it from another. Issue must have been caused by different encodings and was resolved by removing newline in the middle of the command.         # Monthly Backup         system(“$MYSQLDUMP –user=$DB_USER –password=’$DB_PASS’ $db_name > $BACKUP_DIR/$db/${db}_monthly_$datestamp.sql”); Changed to         # Monthly Backup system(“$MYSQLDUMP –user=$DB_USER –password=’$DB_PASS’ $db_nameRead more about sh: 2: Syntax error: newline unexpected[…]