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Different methods to check memory usage in Debian 10 ?

This article will guide you on methods to check the #memory usage in #Debian 10. You can easily visualize from the way these methods have been explained that they are so simple and easy to carry out. 

Therefore, you can find out the available and used memory in Debian 10 at any time you want without any hassle.

Swap space in Linux is used when the amount of physical memory (#RAM) is full. If the system needs more memory resources and the RAM is full, inactive pages in memory are moved to the swap space.

To kill a process in Linux:

1. View Running #Linux #Processes.

2. Locate the Process to #Kill. Locate a Process with ps Command. Finding the PID with pgrep or pidof.

3. Use Kill Command Options to Terminate a Process. killall Command. pkill Command.

4. Key Takeaways on Terminating a Linux Process.

Different Methods to Shutdown Linux Mint 20 ?

This article will guide you on the different methods of shutting down a #Linux Mint 20 system. Whenever you are done with your work on your Linux #Mint 20 system, you can easily pick any method out of these four to turn off your system till you wish to use it again.

sudo chmod u+s /sbin/shutdown

You will be prompted for your root password. After that, you're done and can type "exit" to exit out of the Terminal.

To schedule a #shutdown, add the [time] argument and specify when you want it to take place. There are two ways to shut down the system at a specific time – using the absolute or relative time format.

To  restart Linux Mint:

1. You can go back to the login screen and close your entire session (losing all open applications) by pressing Ctrl+Alt+Backspace. 

2. If your system doesn't respond to that you can cleanly reboot your system by holding down Alt + SysRq and slowly typing the letters "r e i s u b" in that order.

Some Useful VLC Media Player Shortcut Keys

This article will guide you on #shortcuts you can use in VLC media player which can control this application very conveniently. Doing this will not only increase your productivity but will also save your time in locating and using the GUI based controls.

To Edit #VLC Media Player Shortcuts (Hotkeys):

1. In the Menu Bar click on Tools and then “Preferences” [CTRL + P is the shortcut].

2. On the left of the preferences option go to “Hotkeys”.

3. To edit a shortcut double click on one of those Action or Hotkey.

4. A “Hotkey Change” option is displayed.

5. If the shortcut is already used up then a warning is displayed.

Different useful LibreOffice writer shortcut keys ?

This article will guide you on how to use shortcut keys when dealing with #LibreOffice Writer documents.

These #shortcut key combinations will ease your life a lot as they will save your time that is spent in performing the most frequently used operations.

If the active cell is empty Ctrl+A selects the whole table; otherwise it selects the contents of the active cell. Depressing Ctrl+A a second time selects the entire table. If the active cell is empty Ctrl+Home moves the cursor to the beginning of the table.

To make a table in LibreOffice writer:

1. Place the cursor in your document where you want to insert the table.

2. Choose Table - Insert - Table.

3. In the Size area, enter the number of rows and columns.

4. Select the options that you want, click OK.

Different methods to uninstall programs from CentOS 8 ?

This article will guide you on methods to uninstall a #package using #Yum. You need to just type the package name with root privileges. Moreover, we have also seen how to remove a single package, multiple, and group by using the Yum package manager.

apt remove just removes the binaries of a package. 

It leaves residue configuration files. apt purge removes everything related to a package including the configuration files.

To uninstall a program in #Linux Mint terminal:

1. Uninstall software in Linux mint from the main menu.

2. Confirm that you want to #remove the package.

3. Open the Software Manager.

4. Search for a program to remove using the software manager.

5. Remove software in Linux #Mint using the software manager.

6. Open Synaptic package manager.

Process to install and configure Nagios on Linux ?

This article will guide you on how to install and configure the #Nagios #monitoring solution on Linux. We have also explained how to setup remote hosts for monitoring. Now you can easily monitor the health of #Linux #hosts and the services running on them.

Nagios is an open source monitoring system for computer systems. It was designed to run on the Linux operating system and can monitor devices running Linux, Windows and Unix operating systems (OSes).

Nagios provides complete monitoring of applications and application state – including Windows applications, Linux applications, UNIX applications, and Web applications.

To  install Nagios Plugins and NRPE daemon on the Remote Linux Host:

1. Install Required Dependencies.

2. Create Nagios User.

3. Install the Nagios Plugins.

4. Extract Nagios Plugins.

5. Compile and Install Nagios Plugins.

6. Install Xinetd.

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