Category Archives: sysadmin

Linux, sysadmin

Nvidia Drivers on Linux Mint

If drivers fail to load at boot

Your machine boots up with a low-resolution screen, and and after logging in you see an error message to the effect  of “Your system is currently running without video acceleration. You may experience poor performance and high CPU usage“.

There should also be a button to launch the driver manager.

If you’re unable to change things via the driver manager:

From a shell: edit /etc/modules

Make sure the following three lines are there – if not, add them to the bottom of the file:

nvidia
nvidia-drm
nvidia-modeset

Then reboot.

If that doesn’t work, you can see what the system uses with
ubuntu-devices list

You can use ubuntu-devices autoinstall which should do the job.
Reboot when complete.

Or you can install a specific driver version with

apt install nvidia-driver-470 (or what ever version you need). You can use ubuntu-devices list to see available choices. Reboot when complete.

To remove the driver and its associated dependencies, use apt.
Ex.
sudo apt remove nvidia-driver-470
sudo apt autoremove
Then reboot. It should then use the open-source nouveau driver.

You can install the open-source driver to revert to the open-source driver:

sudo apt install xserver-xorg-video-nouveau
Then reboot

Hardware, sysadmin, Tech, Tips

How to Unlock SPA2102

To reset the SPA-2102 to factory defaults follow these steps:

Plug in power adapter.

Plug in a phone to ‘Phone 1′ port of the SPA-2102.

Dial **** You should hear ‘Configuration Option Menu’.

Dial 73738# (RESET#) Press 1 to confirm the reset.

The SPA-2102 should now have been reset to factory default settings.

You may need to do the following to set up web management depending on which interface you are coming in on:

Dial **** into the phone connected to the ATA device. You should hear ‘Configuration Option Menu’.

Dial 7932 then press 1 to enable. Hang up when you hear option saved.

2. Get access to your SPA-2102 web interface. Plug in Ethernet cable to router and wait for several seconds.

Dial ****110# Listen to IP Address which is read back to you.

Plug your PC into the LAN (Ethernet) port of the SPA-2102. Enter IP Address into your web browser (For example. http://192.168.1.10). You should now see the Linksys SPA-2102 Web Interface

 

sysadmin

OwnCloud, php7.0-fpm and Memcache – Stuff I’m Up To

OwnCloud, php7.0-fpm and Memcache

When checking out the setup for our OwnCloud system it came up with a few cautionary problems that needed to be resolved.

The problems related to environment variables and file locking.

php does not seem to be setup properly to query system environment variables. The test with getenv(“PATH”) only returns an empty response. Please check the installation documentation ↗ for php configuration notes and the php configuration of your server, especially when using php-fpm.

and

Transactional file locking is using the database as locking backend, for best performance it’s advised to configure a memcache for locking. See the documentation ↗ for more information.

 

You can go off trawling the documentation to resolve the issues, but in short it’s a simple config change for the php7.0-fpm and an install of the redis-server and php-redis php-apcu modules and a change to the owncloud config.

For php7.0 edit the file /etc/php/7.0/fpm/pool.d/www.conf and uncomment the env[PATH] line. Then restart the php7.0-fpm service.

Enable the PATH environment variable

$ sudo vi /etc/php/7.0/fpm/pool.d/www,conf
...
env[PATH] = /usr/local/bin:/usr/bin:/bin
...

$ sudo systemctl restart php7.0-fpm.service

Install Redis

$ sudo apt-get install redis-server php-redis php-apcu
$ sudo systemctl restart php7.0-fpm.service

Enable memcache.locking in Owncloud

Edit the file /var/www/owncloud/config/config.php

$ sudo vi /var/www/owncloud/config/config.php

...
'memcache.local' => '\\OC\\Memcache\\APCu',
 'memcache.locking' => '\\OC\\Memcache\\Redis',
 'redis' => array(
 'host' => 'localhost',
 'port' => 6379,
 ),
...

References

https://doc.owncloud.org/server/10.0/admin_manual/configuration/server/caching_configuration.html

https://doc.owncloud.org/server/10.0/admin_manual/installation/configuration_notes_and_tips.html#php-fpm

 

Source: OwnCloud, php7.0-fpm and Memcache – Stuff I’m Up To

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