Linux

Rotate Monitor under Linux

I have a pivot monitor and want to set it up correctly. First you get a list of your connected displays with the command xrandr -q This says something like HDMI-0 connected 1920×1200+1920+0 (normal left inverted right x axis y axis) 593mm x 371mm 1920×1200     59.95*+  59.88 1920×1080     60.00    59.94    50.00    60.05    60.00    50.04 1680×1050    

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Update gem behind proxy

I tried to update gem behind a proxy and got the following error message: sudo gem update –system ERROR: While executing gem … (Gem::RemoteFetcher::FetchError) Errno::ETIMEDOUT: Connection timed out – connect(2) for “api.rubygems.org” port 443 (https://api.rubygems.org/specs.4.8.gz) Though the http_proxy and https_proxy (also in upper case) was set it didn’t work.  Trying to set the proxy directly

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Ubuntu 15.10 “error: symbol ‘grub_efi_find_last_device_path”

Updating to the latest grub version (at the moment 2.02~beta2-29ubuntu0.3) leads to “error: symbol ‘grub_efi_find_last_device_path’ not found” when I try to start Windows on my dual boot system having Ubuntu 15.10 next to Windows 10. This can be fixed by downgrading to the version before the latest one in the ubuntu repository till this bug

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