The SSL: SSLV3_ALERT_HANDSHAKE_FAILURE error in Python’s requests module typically occurs due to a failure in the SSL/TLS handshake process. This can be caused by various issues, including incompatible SSL/TLS versions, cipher suites, or SSL certificate problems. Using OpenSSL to Diagnose SSL Issues The OpenSSL command-line tool can be used to manually initiate an SSL handshake …
David Cao
The dict2items filter in Ansible is used to transform a dictionary into a list of key-value pairs. It’s particularly useful for iterating over a dictionary in playbooks or templates. Dict2items Basic Usage Define a Dictionary: Start with a dictionary that you wish to convert into a list of items. vars: my_dict: key1: value1 key2: value2 …
The SSL: SSLV3_ALERT_CERTIFICATE_EXPIRED error suggests that the SSL certificate used by the server you’re trying to connect to has expired. The best and most secure solution is to update the expired certificate with a new, valid one. This usually involves generating a new certificate and configuring the server to use it. If you don’t control …
The set_fact module in Ansible is a vital tool used in playbooks to define or alter the value of variables during playbook execution. This dynamic nature of set_fact allows for greater flexibility and adaptability in managing configurations and automating tasks. With set_fact, you can create new variables on the fly based on the output of …
A subnet, or subnetwork, is a logical subdivision of an IP network. It’s essentially a smaller network within a larger network, created by dividing the network address space into smaller segments. This division is achieved through a process called subnetting. By dividing the network into smaller segments, subnet allows for more efficient management of network …
“Practical Linux System Administration” by Kenneth emerges as a remarkably comprehensive guide for anyone aspiring to master the intricacies of Linux administration. This book is a treasure trove of practical knowledge, seamlessly blending fundamental concepts with advanced techniques. From the outset, Kenneth’s expertise shines through. He meticulously introduces the Linux operating system, making it approachable …
The noexec option in /etc/fstab (File System Table) in Linux is a mount option that specifies how a filesystem should be mounted, particularly with regard to the execution of binaries. When a partition is mounted with the noexec option, it means that you cannot execute any binaries that are stored on that partition. Understanding /etc/fstab …
To fix the “no matching host key type found” error in SSH, you need to modify your SSH client configuration to accept the host key types offered by the SSH server. This error typically occurs when your SSH client does not support or is not configured to accept the host key types provided by the …
In today’s data-driven environment, Excel’s XLOOKUP function is a game-changer, particularly for performing lookups across different worksheets and even different workbooks. This versatility allows for more integrated and complex data analysis. Let’s dive into how you can effectively use XLOOKUP for cross-worksheet and cross-workbook lookups. Understanding XLOOKUP for Cross-Worksheet Lookups Cross-worksheet lookups are essential when …
The search_mode parameter in the XLOOKUP function in Microsoft Excel specifies the direction or method Excel should use when searching for the lookup_value. This parameter can greatly affect how the function operates, especially in large datasets or specific search scenarios. Here’s a detailed explanation of each option within the search_mode parameter, along with examples. Introduction …