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First, create a dump on server A.

A$ redis-cli
127.0.0.1:6379> CONFIG GET dir
1) "dir"
2) "/var/lib/redis/"
127.0.0.1:6379> SAVE
OK
This ensures dump.rdb is completely up-to-date, and shows us where it is stored (/var/lib/redis/dump.rdb in this case). dump.rdb is also periodically written to disk automatically.

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{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch Acceptance test",
            "type": "go",
            "request": "launch",
            "mode": "test",
            "program": "${workspaceRoot}/azuredevops/resource_project_test.go",
            "args": [

Om4ar

#Use pprof debug docker daemon

• Use pprof debug docker daemon
• pprof debug entrypoint
• Start docker daemon in debug mode
• Run socat to make docker sock available via tcp port
• Access debug url entrypoint
  • show global vars
  • get command line
  • run pprof on your client:

Om4ar

#this
ffmpeg -loglevel debug -f hls -referer 'https://10play.com.au/live' -user_agent 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/82.0.4050.0 Safari/537.36' -f hls -i "https://manifest.prod.boltdns.net/manifest/v1/hls/v4/aes128/2199827728001/6bd7fe89-1f2f-42d0-b7a5-c676791a0d83/10s/master.m3u8?fastly_token=NWUzZDliOGZfNTJhZjJhN2IxMzQ5OTdjNGVkYmEzODkwNjYwZTYyMWY2ZmY1YjNmNGJkNWM3NjdiNDFiZmViNjczNzMwMmJlYQ%3D%3D" -c copy project5.mp4

# or this
ffmpeg -loglevel debug -f hls -referer 'https://10play.com.au/live' -user_agent 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/82.0.4050.0 Safari/537.36' -f hls -i "https://manifest.prod.boltdns.net/manifest/v1/hls/v4/aes128/2199827728001/6bd7fe89-1f2f-42d0-b7a5-c676791a0d83/10s/master.m3u8?fastly_token=NWUzZDliOGZfNTJhZjJhN2IxMzQ5OTdjNGVkYmEzODkwNjYwZTYyMWY2ZmY1YjNmNGJkNWM3NjdiNDFiZmViNjczNzMwMmJlYQ%3D%3D" -c copy -bsf:a aac_adtstoasc project3.mp4

Om4ar

Day 1

• Read How to answer a coding interview.
• Read Using sliding window technique to solve coding interview questions.
• Practice coding Array 1 Two Sum
• Practice coding Array 2 Three Sum
• Practice coding Array 3 Max Consecutive Ones III
• Practice coding Array 4 Maximum Product Subarray

Day 2

• Read Using state machine to solve complex coding interview questions.

Om4ar

Teach kids programming 🆒

2 min read

![][4]

A collection of resources

I've been gathering the best resources to teach children & teens programming — books, environments, apps, courseware and games.

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docker logs nginx 2>&1 | grep "127." 

# ref: http://stackoverflow.com/questions/34724980/finding-a-string-in-docker-logs-of-container

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Add a submodule

git submodule add https://github.com/janjarfalk/canvasrunner.git components/canvasrunner/

Update all submodules

git submodule foreach git pull origin master
cd ..
git commit . -m "Updated submodules"

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# Use ffmpeg to decode input video (GIF in this case)
ffmpeg -i input.gif decode/%d.png

# Use ImageMagick to crop, format: (W)x(H)+(W_SFHIT)+(H_SHIFT)
# Note the {from..to..skip} usage of Bash
convert decoded/{1..759..5}.png -crop 315x172+20+40 resized/%d.png

# An resize option
# convert decoded/{1..759..5}.png -crop 315x172+20+40 -resize 30% resized/%d.png

Om4ar

Kafka Topics

Describe a topic

kafka-topics --zookeeper localhost:2181 --describe --topic TOPIC_NAME

list topic offsets

sudo docker run --net=host --rm confluentinc/cp-kafka:4.1.2-2 kafka-consumer-groups --bootstrap-server localhost:9092 --describe --group GROUP_NAME

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