Rahul Sahu

In Bash, you can clear the DNS cache by flushing the system resolver cache. Here are the steps to clear the DNS cache in Bash: Open a terminal window and type the following command to clear the cache: sudo systemd-resolve –flush-caches This command will flush the DNS cache and any other caches that may be … Read more

The realpath command in Linux can be used to find the absolute pathname for a given command or file. Here’s an example: $ realpath /usr/bin/python /usr/bin/python In this example, we’re using realpath to find the absolute pathname for the python command located in the /usr/bin directory. The output shows that the absolute pathname for this … Read more

A protective leather shell for a MacBook or MacBook Pro is a type of cover that is designed to protect the device from scratches, dings, and other types of damage that can occur during everyday use. These shells are typically made from high-quality leather that is durable and resistant to wear and tear. A leather … Read more

To run or call a shell script from AppleScript, you can use the do shell script command. Here’s an example: set myScriptPath to “/path/to/my/script.sh” do shell script myScriptPath In this example, the myScriptPath variable contains the path to the shell script that you want to run. The do shell script command then executes the script. … Read more

Transaction Signatures (TSIG) is a method of authenticating DNS messages between servers, allowing for secure communication and transfer of DNS zones. Here’s how you can configure TSIG on a BIND DNS server: Generate a shared secret key that will be used to authenticate DNS messages. You can use a tool like dnssec-keygen to generate the … Read more

To rename a file in Bash, you can use the mv command, which is used to move and rename files. Here’s the basic syntax: mv old_filename new_filename For example, to rename a file named “file.txt” to “new_file.txt”, you can use the following command: mv file.txt new_file.txt This will rename the file “file.txt” to “new_file.txt” in … Read more

Functions in Bash shell scripts allow you to group a set of commands together and call them from multiple places in your script. Here are some examples of how to define and call Bash shell script functions: Define a function that prints a message to the console: function my_function { echo “Hello, World!” } You … Read more

In Bash, you can iterate over an array in several ways. Here are some examples: Iterate over an array using a for loop: my_array=(apple banana cherry) for i in “${my_array[@]}” do echo “$i” done This will loop through each element in the my_array array and print it to the console. Iterate over an array using … Read more

To gracefully reboot the Apache server from the shell in Linux or Unix-based systems, you can use the apachectl command with the -k graceful option. Here are the steps: Open a terminal window on your Linux or Unix-based system. Switch to the root user or use the sudo command to run the following command: apachectl … Read more

To display the network routing table information on Solaris UNIX, you can use the netstat command with the -r option. Here are the steps: Open a terminal window on your Solaris machine. Type the following command to display the network routing table information: netstat -r This will display a list of routes in the routing … Read more