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## create_rsa_key.md

      
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                iamucil
                / create_rsa_key.md
            
            
              Created
              June 7, 2020 18:19
            
              
                Creating public/private key pairs
              
          
    openssl genpkey -algorithm RSA -out rsa_private.pem -pkeyopt rsa_keygen_bits:2048
openssl rsa -in rsa_private.pem -pubout -out rsa_pub.pem

JWT RSA Key minimum key size is 2048, for extra security increase bit lengths to 4096.

  
## go mod rename module.sh
go mod edit -module {NEW_MODULE_NAME}
-- rename all imported module
find . -type f -name '*.go' \
  -exec sed -i -e 's,{OLD_MODULE},{NEW_MODULE},g' {} \;

## metacopy | docker build fail on kernel 4.19.4
echo N | sudo tee /sys/module/overlay/parameters/metacopy

## conversion.py
inp = input("Identifier: ")
try:
    val = int(inp)
    print('%x' % val)
except ValueError:
    print(int(inp, 16))

## docker postgre data
```bash
docker volume create postgres-data
```
-- override docker-compose > docker-compose.override.yml
version: '3'
services:
  postgres:
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: dbPassw0rd

## psql docker run query
cat file.sql | docker-compose exec -T container_name psql -U pg_user -a -v "options=--search_path=schema" -d db_name
	go mod edit -module {NEW_MODULE_NAME}
	-- rename all imported module
	find . -type f -name '*.go' \
	-exec sed -i -e 's,{OLD_MODULE},{NEW_MODULE},g' {} \;
	inp = input("Identifier: ")
	try:
	val = int(inp)
	print('%x' % val)
	except ValueError:
	print(int(inp, 16))
	```bash
	docker volume create postgres-data
	```
	-- override docker-compose > docker-compose.override.yml
	version: '3'
	services:
	postgres:
	environment:
	POSTGRES_USER: postgres
	POSTGRES_PASSWORD: dbPassw0rd