Ioannis Poulakas giannisp

## gist:45ab01577cefc8113b43ef186b903388
7z a file.7z file.txt -mhe=on -p1234

## gist:12bf8b6f04da064a1cafdfc570155624
openssl s_client -showcerts -connect example.com:443

## gist:014ab4a30a1c968f599f81d86bc4909a
identify -format '%[EXIF:*]' image.jpg

## gist:daa5150ae1a1ae6c829ffc84b230b82f
sudo ntpdate -u time.apple.com

## gist:3053a020d1e1f4054ca1001e53238928
cat 2018e.json | jq '{ version: .version, zones: [.zones[].name] }' > timezones.json

## gist:2ce8cc5998254815408fbe1549cd2c85
docker update --restart=no container

## gist:fb7ed841e702dc3dc58b7f1a933642e6
defaults write -g CGFontRenderingFontSmoothingDisabled -bool NO

## gist:b53a76047b07751ed3ade3c1db1d2c51
After automatically updating Postgres to 9.6.1 via Homebrew, the pg_ctl start command didn't work.
The error was something like "database files are incompatible with server".

Database files have to be updated before starting the server, here are the steps that had to be followed:

# need to have both 9.6.1 and latest 9.5.x installed, and keep 9.6.1 as default
brew unlink postgresql
brew install postgresql95
brew unlink postgresql95
brew link postgresql

## gist:848636b35837c0e98324ef5ac5f2aa15
# store passphrase on keychain
ssh-add -K

# and/or add to ~/.ssh/config:
Host *
  UseKeychain yes

## gist:922338526de5cad740b15703ab6f98b3
brew install ffmpeg

ffmpeg -re -i "https://<HLS-url>/playlist.m3u8" -acodec libmp3lame -ar 44100 -b:a 128k -pix_fmt yuv420p -profile:v baseline -s 426x240 -bufsize 6000k -vb 400k -maxrate 1500k -deinterlace -vcodec libx264 -preset veryfast -g 30 -r 30 -f flv "rtmp://rtmp-api.facebook.com:80/rtmp/<rmtp-url>"
	After automatically updating Postgres to 9.6.1 via Homebrew, the pg_ctl start command didn't work.
	The error was something like "database files are incompatible with server".

	Database files have to be updated before starting the server, here are the steps that had to be followed:

	# need to have both 9.6.1 and latest 9.5.x installed, and keep 9.6.1 as default
	brew unlink postgresql
	brew install postgresql95
	brew unlink postgresql95
	brew link postgresql
	# store passphrase on keychain
	ssh-add -K

	# and/or add to ~/.ssh/config:
	Host *
	UseKeychain yes
	brew install ffmpeg

	ffmpeg -re -i "https://<HLS-url>/playlist.m3u8" -acodec libmp3lame -ar 44100 -b:a 128k -pix_fmt yuv420p -profile:v baseline -s 426x240 -bufsize 6000k -vb 400k -maxrate 1500k -deinterlace -vcodec libx264 -preset veryfast -g 30 -r 30 -f flv "rtmp://rtmp-api.facebook.com:80/rtmp/<rmtp-url>"