Questions
Find answers to frequently asked development questions. For information about Better Stack products, explore our docs.
How to generate a private key for the existing .crt file on Nginx?
Unfortunately, this is not possible. You cannot generate a private key out of an existing certificate. If it would be possible, you would be able to impersonate virtually any HTTPS webserver.
How to generate a private key for the existing .crt file on Apache?
Unfortunately, this is not possible. You cannot generate a private key out of an existing certificate. If it would be possible, you would be able to impersonate virtually any HTTPS webserver.
How to Execute Multiple Commands in Docker-Compose?
It is possible to define and run multiple commands in the docker-compose.yml file. To execute multiple commands using Docker-Compose, structure the file in the following way: ... services: app: ...
How to display remote SSL certificate details with CLI tools/cURL?
You can use `openssl` command like this. Replace the highlighted part with the select domain name
Docker How to Change Repository Name or Rename Image?
Docker image Docker image name and tag are just an alias to a docker image id that looks similar to this d583c3ac45fd. If you want to change the name, run the following command: docker image tag ol...
How to Get a Docker Container’s Ip Address from the Host?
By default, the container is assigned an IP address for every Docker network it connects to. And each network is created with a default subnet mask, using it as a pool, later on, to give away the I...
How to Force Docker to Clean Build an Image?
When executing docker pull or docker run command, the daemon first checks for a similar image in the local machine by comparing the digests of the image. If it finds a match, the daemon simply crea...
How to Fix Docker Permission Denied Issue?
If you are struggling with the Docker permission denied error, we have prepared a quick fix for you. Step 1 - Create a docker group The first step is you create a docker group if you haven’t done i...
How to Explore Docker Container’s File System?
If you want to explore the Docker container’s file system, you can use on of the following methods. Using the docker exec command Docker version 1.3 or newer supports the docker exec command. This ...
Solved: Errors in crontab file, can't install
You may encounter this error while creating a new crontab or updating an existing one that has a syntax error.
Solved: Error 526 Invalid SSL Certificate
Error 526 indicates Cloudflare is unable to successfully validate the SSL certificate on the origin web server and the SSL setting in the Cloudflare SSL/TLS app is set to Full SSL (Strict) for the website.
Solved: Error:0D0680A8 : asn1 encoding routines: ASN1_CHECK_TLEN: wrong tag
This error is due to an invalid certificate format installed on the Apache webserver.
Solved: ERR_SSL_VERSION_OR_CIPHER_MISMATCH
When you are accessing the HTTPS secured website a series of steps is taken in the background to ensure that the connection is safe and trusted. Some of these steps consist of checking certificates. If the browser does not believe that the connection would be secure it displays this error.
How Do I Edit a File inside a Docker Container?
If you want to edit a file inside a docker container, you can follow these steps: 1. Find the id of the container To find the id of the running container, you can use the following command: docker ...
Does each subdomain need its own SSL certificate?
This depends purely on what type of certificate you have. You can have a standard single domain certificate. Aside from that, you can also get two following types of certificates.
What Is the Difference between the ‘COPY’ and ‘ADD’ Commands in a Dockerfile?
When creating a Docker file, you may need to transfer some files from the host system to the docker image. Those files may be for example libraries or any other files that your application may need...
What Is the Difference between a Docker Image and a Container?
Docker image A Docker image ****is an immutable (unchangeable) file that contains the source code, libraries, dependencies, tools, and other files needed for an application to run. Sometimes these ...
What Is the Difference between Docker-Compose Ports and Expose?
You may have wondered what is the difference between docker-compose ports and docker-compose expose. Here is a clear explanation to help you better understand the matter. Ports Ports mentioned in t...
What Is the Difference between CMD and ENTRYPOINT in a Dockerfile?
There is a big confusion around similarity and lack of clarity in the difference between the CMD and ENTRYPOINT instruction in Docker. Let’s clear things up. See the example Let’s say we want to cr...
How to Delete All Local Docker Images?
If you have a large number of docker containers and images, you can remove them all at once. Remove all docker images To delete all docker images, run the docker rmi command: docker rmi -f $(docker...
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