Useful tips for everyday
What will happen to CentOS 7? CentOS/CentOS Stream If you’re using CentOS 7, you don’t have to move immediately. Red Hat will continue to support…
How can I use Ubuntu and Windows 7 together? Ubuntu installation on a physical machine with an existing Windows 7 operating system Download Ubuntu ISO.…
How do you add elements to an array in a for loop? Getting the sum using a for loop implies that you should: Create an…
Can I delete empty folders? Generally speaking, it is safe to delete empty folders, although you would make no real space savings as they occupy…
How do I allow traffic on port 80? To open port 80 From the Start menu, click Control Panel, click System and Security, and then…
Why is my card number showing wrong? An invalid card number means that the card is likely closed at the card issuing bank and is…
What is stdout Fileno? STDOUT_FILENO is an integer file descriptor (actually, the integer 1). You might use it for write syscall. The relation between the…
How do you stop a user session in Linux? Kill a Unix login session remotely Identify the shell you want to kill. To show all…
Where is the apache2 config file? /etc/apache2/apache2 The main configuration details for your Apache server are held in the “/etc/apache2/apache2. conf” file. This file is…
How do I go back to a screen session? Use the key sequence Ctrl-a + Ctrl-d to detach from the screen session. Reattach to the…