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I will introduce this topic with a real example. The scenario is that I have two external NTFS hard drives. I want them to behave like the partition on Windows, like D drive, E drive something. However, every time when the Ubuntu is rebooted, those two hard drives are mounted to the path /media/<username>/<label name> and they are read-only. I wrote a temporary solution for the above issue, but it stil requires to execute the command every time when PC boots. This post will give a one-go solution. ...

Yesterday I installed Ubuntu on my PC, but I met an issue about the external drive is always the read-only. As the hard drive was the destination of my internal minio server, so I have make it writable too. Error: mkdir: cannot create directory ‘abc’: No such file or directory When I ran the df -T, it shows like /dev/sdb2 fuseblk 3907000316 278934580 3628065736 8% /media/username/InternalBackup I labelled the hard drive name as InternalBackup in the Windows OS before. ...

Error: Your Command Line Tools are too outdated By following the instruction from the official website Alternative install methods: macOS, I got an error while running brew install ubuntu/microk8s/microk8s as shown below As the prompt suggested, I installed the latest Xcode from the AppStore. (It took quite long to be honest). But it still showed the same error after updating the Xcode to the 13.2.1 The trick is that we should run the following commands: ...

When we manage and maintain a public github repository, it is common to see a case that a fixed branch from outside contributor’s is staled. The reasons can be The github repository owner/maintainer and contributor did not actively process the issue in time. The contirbutor only commited the changes in his branch but didn’t make a pull request, and after a period, he is not reachable. Other reasons… Overall, it is not easy to maintain a public github repository, especially the one with lots of stars. This post will show a way to solve the above issue with a git feature. ...

In Git, we can ignore to track of a file or folder by adding their paths into the file .gitignore. However, sometimes we could mistakenly commit and push file and folders that are not needed to be tracked by Git. In such case, .gitignore will be not working. The issue can be solved by the below steps: Add the file path into .gitignore file. Remove the commited file from the git cache by git rm --cached bar/foo.log Commit the changes by git commit -m "xxx" After executing the above steps, you can see the file bar/foo.log is still there but will be not tracked by Git. ...

It is very common for developers to set Environment Variable while doing some development work or configuring the development environment. There are two kinds of Environment Variable: temporary and permanent. This post will show how to set both on macOS 1. Temporary environment variable We can simply execute the below command in the Terminal export [env_key]=[env_value] For example, to set DEBUG_MODE to true before running the development project. export DEBUG_MODE=true 2. Permanent environment variable Go to the user working directory to locate the file .bash_profile. Normally we can use vi ~/.bash_profile. Add the below command to the bottom of the file export [env_key]=[env_value] Save the changes with :wq in vim Refresh the cache of .bash_profile with source ~/.bash_profile After setting the environment variable, we can type echo ${env_key} to validate if it is successfully set. ...

Again, Inkscape is a free and open-source vector graphics editor. Open Inkscape Right click and choose Trace Bitmap, just simply click OK After trace bitmap, the original svg file is still in the background, we need to resize the front processed svg in order to showing out the original svg file. And delete it Done In this example, the svg image has full black color surround it. We should make some space for it so that it can look better. Set image size 22px, document size 24px, starting point is (1,1)

1. Find the running process with <PORT> netstat -ano | findstr :<PORT> 2. Delete the running process with <PID> taskkill /PID <PID> /F # Or tasklist /FI "PID eq <PID>" 3. Find the running Named Pipe Open the powershell with the administrator permission and execute get-childitem \\.\pipe\ | grep "me.clic.ipc.v1"

Inkscape is a free and open-source vector graphics editor. Open the graphic software Inkscape Drag the svg file into the software Adjust the width and height Press Shift+Ctrl+E to open the dialog of Export PNG Image Change to Page tab and adjust the Width and Height. Set up the output path with the button Export As Export the file with the button Export

Another way to ask this question is what will happen after typing a https url in your web browser? The browser requests secure page (HTTPs) from a web server. The server sends its public key with its SSL certificate, which is digitally signed by a third party, or we call Certificate Authority, or simply CA. Once the browser gets the certificate, it will check the issuer’s digital signature to make sure the certificate is valid. As we know, a digital signature is created by a CA’s private key, and the browser, either Chrome or Firefox, is previously installed with many major CA’s public keys. Thus, digital signature can be verified. Once the certificate’s signature is verified, the digital certificate can be trusted. The browser creates one symmetric key, or a shared secret. It keeps one and gives a copy to the web server. However, the browser does not want to send the shared secret in plain text. Therefore, it uses the web server’s public key to encrypt the secret, and then sends it to the web server. When the web server gets the encrypted symmetric key, it uses its private key to decrypt it. Now the web server gets the browser’s shared key. From now on, all traffic between the client and the web server will be encrypted and decrypted with the same key, a symmetric key.