Aug 28
Abstract Factory Pattern Example in Java From: AI Tools/OpenAI/Chatgpt “ Perfect 👍 Let me give you a clean, copyright-free Abstract Factory Pattern Java example with explanation. 🏭 Abstract Factory Pattern Example in Java Problem: We want to create UI components (Button, Checkbox) for different operating systems (Windows and Mac). The client should be able to …
Aug 28
From AI Tools/Open AI/ChatGPT “ Perfect 👍 Here’s a copyright-free comparison table of the Builder Pattern vs Factory Pattern in Java, styled for easy posting on Facebook/Blog: 🏗️ Builder Pattern vs ⚙️ Factory Pattern in Java Aspect Builder Pattern Factory Pattern Type Creational design pattern Creational design pattern Purpose To construct complex objects step by …
Aug 28
Observe the code below: We wanted to create objects such as shape1, shape2, and shape 3. We did not directly (create and) call the class for the required objects. We did not create or call a circle class, or a square class, or a rectangle class. We rather thought there was a factory class that …
Aug 28
Observe these two examples of Object Creation from the Student Class We did not call the constructor with the property values, but we built the object step by step with only the properties and values we needed. This can be useful when we have classes with many properties, many properties/attributes are also optional or serve …
Dec 23
“yum upgrade and yum update will perform the same function that update to the latest current version of package. But the difference is Upgrade will delete obsolete packages, while update will preserve them.Jul 3, 2014” https://unix.stackexchange.com/questions/55777/in-centos-what-is-the-difference-between-yum-update-and-yum-upgrade 3.3. UPDATING PACKAGES FROM THE COMMAND LINE WITH YUM https://access.redhat.com/documentation/en-us/red_hat_network_satellite/5.5/html/reference_guide/sect-reference_guide-package_updater-updating_packages_from_the_command_line_with_yum yum install package_nameyum update package_nameyum check-updateyum remove package_nameyum provides …
Dec 23
Check if your yum server is working or not yum repolistyum install tree yum repolist enabledyum repolist all
Dec 23
Let FTP work through Firewall firewall-cmd –add-service=vsftpd –permfirewall-cmd –add-service=ftp –permsystemctl reload firewalldsystemctl start firewalldsystemctl enable firewalldvi /etc/yum.repos.d/local.repo
Dec 23
AutoFS and Mounting in Linux/Redhat/CentOS echo “AutoFS – Automatic FS system Mounting – Dec 26th, 2017 by Sayed” check if Autofs installed or notyum list installed | grep autofs I just installed; hence it is thereyou can install with yum -y install autofs yum -y install autofs then you can enable autofssystemctl status autofssystemctl start …
Dec 08
Kill a Process •kill PID •kill -SIGNAL PID •Kill –s 9 pid •Kill -9 pid •kill -15 PID •
Dec 08
Important Notes •System Processes •usually run •in the background •Use & to start •a process to the background •Use fg •to bring to foreground •Ctrl+z takes to background
