Category Archives: Ubuntu

Linux Ubuntu

Force a logout shortcut, in Ubuntu

26/01/2014 – 23:59

If everything is blocked / freezed, you can try this: CTRL + ALT + F2 After this, you will be asked for your username and password to login. Type them then type this: $ killall -u [your-username] gnome-session That’s it. Of course all your unsaved data is lost !

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Linux Ubuntu

Restart Ubuntu 12.04 sound system if pulseaudio/ALSA don’t work

26/01/2014 – 23:54

If suddenly you have no sound on your ubuntu system, you should try this: $ pulseaudio -k && sudo alsa force-reload Also this should work: $ killall pulseaudio

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Linux Nginx Ubuntu

Nginx – upstream sent too big header while reading response header – solution

17/06/2013 – 08:45

If you get this kind of error in your nginx logs: ERROR: *1754 upstream sent too big header while reading response header from upstream, client: X.X.X.X, server: XXXX One solution that worked for me, was to set the fastcgi_buffers and fastcgi_buffers_size in nginx configuration file: $ vim /etc/nginx/nginx.conf Add the following params to your nginx read more »

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Redis Ubuntu

Installing Redis + Php Redis Extension + igbinary in Ubuntu 12.04

07/06/2013 – 13:51

This is a quick example of how to install Redis server, Redis PHP extension + Igbinary in Ubuntu 12.04. All steps requires sudo access. 1. Install Redis server Because the official Ubuntu PPA is not updated with the latest version of Redis, we need to add another repository: $ sudo add-apt-repository ppa:chris-lea/redis-server $ sudo apt-get read more »

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Iptables Linux SSH Ubuntu

Port forwarding with iptables

31/05/2013 – 09:59

If you ever want to try port forwarding with iptables, here is a quick example of forwarding a public port (45000) – public network to a private port (22) – ssh – private network: $ iptables -t nat -A PREROUTING -p tcp –dport 45000 -j DNAT –to-destination 192.168.1.200:22 $ iptables -t nat -A POSTROUTING -j read more »

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Linux Ubuntu

Ubuntu server network problems – network down after reboot

14/07/2012 – 18:01

I’ve experimented a strange situations a few days ago. After a few updates, my VPS became unreachable. Ifup command was throwing me errors – directory “/var/run/network” does not exists. After a few hours of researches, it seems that this is a problem that was solved back in 2008. Unfortunately, for some reasons – most probably read more »

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