Mostly, we have only a single display connected to computer systems. However, you can have multiple displays connected to a system. While working with more than one display, sometimes you might find yourself in a situation where-in you need to perform a display-specific task. For example, taking a screenshot. In these scenarios, you need to ... Read more
I have mentioned various ways to transfer the data between two computers in this post. Transferring the data using an Ethernet cable is one of the fastest and cheapest methods. All you need is an Ethernet crossover cable (or a network switch plus two normal network cables) and NICs (Network card interfaces) on your computers ... Read more
The Windows Firewall is included in every Windows operating system to keep our computer safe from bad guys. However, if you are using Windows Server 2016 in your data center, you may be using a dedicated firewall as a replacement. It is recommended to turn off the Windows firewall in that case. Disable Windows Server ... Read more
A firewall is used to keep unauthorized users from accessing files and resources on your computer. Unfortunately, the Windows firewall is not perfect and can cause harm to your computer. There is better firewall software available for windows, so you might want to turn it off and use some other software. Below are the steps to ... Read more
The firewall is the security defender of Windows operating systems. When enabled, the firewall blocks any unwanted websites or advertisements that can harm your computer system in any way. Usually, Windows Firewall has a predefined set of rules according to which it allows or restricts access to certain programs. However, you can also create your ... Read more
No one can send ping requests to your system to know whether it is alive or not when the Firewall is enabled on your Windows 10 computer system. You can enable ping by disabling the Firewall but this can prove to be very disastrous, as your PC will be exposed to external threats and malware. ... Read more
Some internet access providers have port 25 disabled in their routers to prevent spam. If you run your own email server in a data center, you might have to enable the submission port (587) in postfix to be able to send emails from your local email client to your own mail server. Enable Submission Port ... Read more
When you get the error message "system-config-firewall: command not found" on your CentOS Server while trying to configure the firewall on the shell, then the text interface version of the firewall configuration utility is missing. Install CentOS Firewall configuration tool Install it with this command: yum install system-config-firewall-tui
The current status of a Linux software raid is written to the virtual file /proc/mdstat. You can view the status on the shell easily with the cat command: cat /proc/mdstat The output will look similar to this: Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] md2 : active raid1 sda3[0] sdb3[1] 726266432 blocks [2/2] [UU] md1 ... Read more
If a process is shown with process state "D" in tools like ps or top, then it's an uninterruptable process. Example: ps axl | grep D F UID PID PPID PRI NI VSZ RSS WCHAN STAT TTY TIME COMMAND 4 104 2579 9109 20 0 5024 2116 refrig D ? 0:00 cleanup -z -t unix ... Read more