Fix lack of support for exfat filesystem on Ubuntu

 sudo apt-get install exfat-fuse exfat-utils

Source: https://askubuntu.com/questions/1057423/ubuntu-18-04-does-not-mount-2tb-exfat-drive-even-after-installing-exfat-fuse-exf

Libre Office Calc - convert time

Time is expressed as a fraction of a full day for the purpose of calculation. Here are typical formulae to obtain decimal equivalents of time cell X00:

=X00/7 to get weeks

=X00*24.0 to get hours

=X00*24.0*60.0 to get minutes

=X00*24.0*60.0*60.0 to get seconds

etc.

Transform a wireless router into a switch

 To use an old wireless router as a switch to connect more devices, loosely follow these steps:

1) Connect router to network as a router (via the WAN port), temporarily.

2) Find its IP and via a browser connect to the router admin interface (depends on vendor).

3) Disable Wireless functionality, instructions depend on vendor. Example for DLink

4) Disable DHCP for router, instructions depend on vendor, look somewhere in LAN settings.

5) Save settings and reboot router.

6) Connect the "internet" cable to one of the LAN ports instead of WAN port, consider WAN port as "dead" now.

7) If it worked, all devices connected to the new switch will have IPs assigned by the main router.

- - -

8) If you need to change settings, reconnect via the WAN port again to access admin interface.

Nginx timeout setting

Taken from following Source:

https://ubiq.co/tech-blog/increase-request-timeout-nginx/

Increase Request Timeout in NGINX

If you want to increase request timeout to 300 seconds, then add proxy_read_timeout, proxy_connect_timeout, proxy_send_timeout directives to http or server block

http{
   ...
   proxy_read_timeout 300;
   proxy_connect_timeout 300;
   proxy_send_timeout 300;
   ...
}

In the above case, the request timeout will be increased for all servers in your NGINX configuration file.

If you want to increase request timeout only for a specific server or subdomain, then add proxy_read_timeout, proxy_connect_timeout, proxy_send_timeout directives for its server block.

server{
   ...
   proxy_read_timeout 300;
   proxy_connect_timeout 300;
   proxy_send_timeout 300; 
   ...
}

If you want to increase request timeout only for specific folder or URL, then add proxy_read_timeout, proxy_connect_timeout, proxy_send_timeout directives for that specific location block.

location /upload {
   ...
   proxy_read_timeout 300;
   proxy_connect_timeout 300;
   proxy_send_timeout 300; 
   ...
}

For large values, you can also specify time units such as 1d for 1 day.

Gunicorn timeout setting

Create gunicorn.conf.py in working dir

fill with

timeout = 120

restart gunicorn for changes to take effect.

Sources:

https://docs.gunicorn.org/en/stable/settings.html#settings

https://github.com/benoitc/gunicorn/blob/master/examples/example_config.py

ImageJ/FIJI settings file

 ~/.imagej/IJ_prefs.txt on Linux

CMake cannot find CUDA

specify CUDA_TOOLKIT_ROOT_DIR to cmake:

cmake -D CUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda-5.5 

Source: https://stackoverflow.com/questions/19980412/how-to-let-cmake-find-cuda 

important to have the version at the end of path in my own experience