Posts (page 239)
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3 min readTo check the current date and time in Bash, you can use the date command. By simply running the date command in your Bash terminal, it will display the current date and time according to your system's settings.
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6 min readTo mock a URL connection in Kotlin, you can make use of the MockWebServer library. Here's how you can do it:First, add the MockWebServer dependency to your project. You can add it to your build.gradle file as follows: dependencies { testImplementation 'com.squareup.okhttp3:mockwebserver:4.9.0' } Create a new test class or file for your URL connection test. Import the necessary packages: import okhttp3.mockwebserver.MockResponse import okhttp3.mockwebserver.
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7 min readConfiguring HTTPS for a Java-based web application involves several steps. Here is an overview of the process:Generate a Keystore: A Keystore is a storage facility for cryptographic keys and certificates. Create a Keystore file that will store your SSL certificate and private key. Obtain an SSL Certificate: Acquire an SSL certificate from a valid Certificate Authority (CA). This certificate will authenticate the identity of your web application to clients.
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2 min readTo compare strings in Bash, you can use different operators and commands.
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7 min readWhen troubleshooting SSL certificate chain issues, the following steps can help in identifying and resolving the problem:Verify the certificate chain: Start by ensuring that each certificate in the chain is valid and issued by a trusted certificate authority (CA). Check the expiration dates, intermediate certificates, and the root CA certificate to ensure they are all correctly configured.
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7 min readThe "grep" command is a powerful tool used in Unix-based operating systems to search for specific patterns or text within files. It allows you to filter and extract lines that match certain criteria, making it an efficient way to locate information.To use the "grep" command, the basic syntax is as follows: grep [options] pattern [file...
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6 min readTo create a traditional for-loop in Kotlin, you can use the for keyword followed by a pair of parentheses enclosing an initialization expression, a condition expression, and an iteration expression. Inside the loop body, you can perform the desired operations.
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10 min readTo configure HTTPS for a Node.js application, you can follow these steps:Generate a private key and a public certificate: Use a tool like OpenSSL to generate a private key file. For example: openssl genrsa -out private-key.pem 2048 Generate a certificate signing request (CSR) file using the generated private key. For example: openssl req -new -key private-key.pem -out csr.pem Self-sign the CSR to generate a public certificate. For example: openssl x509 -req -in csr.pem -signkey private-key.
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3 min readTo kill a process in Bash, you can use the kill command followed by the process ID (PID) of the process you want to terminate. Here's how to do it:First, you need to identify the PID of the process you want to kill. To do this, you can use the ps command to list all running processes along with their PIDs. The ps aux command is commonly used for this purpose. Once you have identified the PID of the process you want to kill, you can use the kill command.
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5 min readThe maximum memory size or heap size of the Kotlin compiler can be changed by modifying the JVM options. Here's how you can do it:Locate the Kotlin compiler installation directory. It is usually found in the path where the Kotlin SDK is installed. Open a text editor and create a new file (if it doesn't exist already) named kotlinc.xml in the Kotlin compiler installation directory. Edit the kotlinc.
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7 min readPerfect Forward Secrecy (PFS) is a cryptographic property that ensures confidentiality of data exchanged over a network, even if the long-term encryption keys used to encrypt the data are compromised in the future. It provides an additional layer of security by preventing an attacker from retroactively decrypting past communications if they gain access to the private keys.
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5 min readTo check the size of a file in Bash, you can use the stat command in combination with the file path.Here is an example of how you can do it:Open your terminal or command prompt.Type the following command: stat --printf="%s" /path/to/file Replace /path/to/file with the actual path of the file you want to check. Press Enter.The stat command retrieves information about files in Linux and provides various data formats.