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How do I use the drop command in SQL?

2022-12-20T11:56:35+00:00

DROP can be used to remove a single table or an entire database.

A database, table, index, or view that is already in existence is destroyed by the DROP statement.

A relational database management system component can be removed using the SQL DROP statement (RDBMS).

database_name: Name of the database to be deleted.

What is VM Vfs_cache_pressure?

2022-12-20T11:54:40+00:00

vfs cache pressure. This setting regulates the kernel's propensity to reclaim the RAM needed to cache directory and inode objects. The kernel will try to reclaim dentries and inodes at a "fair" pace with respect to pagecache and swapcache reclamation when the default setting of vfs cache pressure=100 is used.

How do I fix a WiFi problem in Ubuntu 18.04?

2022-12-20T11:51:33+00:00

We must launch the programme Software & Updates. Then, we'll click the Additional Drivers option to see whether any Wi-Fi drivers are suggested for installation. If so, we need to choose the driver and click the Apply Changes button. Allow some time for the installation to complete.

Who is the parent of all the processes in Linux?

2022-12-20T11:50:00+00:00

With the exception of the startup process, every process in the operating system is started when a process calls the fork() system call. The parent process is the one that used the fork() system call. So a parent process is a process that generates a child process.

What command is used to clear the terminal screen?

2022-12-20T11:41:46+00:00

To clear the terminal screen, use the clear command from the Unix operating system. This command first searches the environment for the type of terminal, and then it searches the terminfo database to determine how to clear the screen. Additionally, this command will disregard any possible command-line inputs. Additionally, the clear command doesn't accept any arguments and is practically identical to the cls command on a variety of other Operating Systems.

How do you make a file executable in Ubuntu?

2022-12-20T11:09:58+00:00

An executable file's user rights must be correctly specified in order for it to run.

To achieve this, take the following actions:

Start a terminal.

Navigate to the folder containing the executable file.

Enter the command as follows:

for any . bin file: sudo chmod +x filename.bin

for any .run file: sudo chmod +x filename.run

Enter the necessary password when prompted to do so.

Now the current user with root access can execute the file.

Which is the best beginner-friendly Linux distro?

2022-12-20T10:54:25+00:00

As Ubuntu is the most widely used distribution among both new and experienced Linux users, it comes in first on our ranking. As a result, it has a sizable user base and is simple to obtain support for. Many other distributions use Ubuntu as a foundation because it is an open-source, robust distribution.

What happens if you boot a PC without RAM?

2022-12-20T10:53:24+00:00

you may be able to turn on your PC without RAM, but you'll immediately hear several beeps that show the RAM is missing. Every computer system needs RAM to send information and instructions to the CPU. If you don't have RAM, your system can't get past the power-on self-test (POST) stage.

What does sudo ldconfig do in Ubuntu?

2022-12-20T10:39:26+00:00

In the directories supplied on the command line, in the file /etc/ld.so.conf, and in the trusted directories (/lib and /usr/lib), ldconfig generates the required links and cache to the most recent shared libraries. The run-time linker, http://ld.so or http://ld-linux.so, uses the cache. When selecting which versions of libraries should have their links changed, ldconfig looks at the header and filenames of the libraries it comes across.

How do I open an .air file?

2022-12-20T10:30:15+00:00

An installation package for Adobe AIR apps is known as an AIR file. It has all the necessary code and resources for an application. The most common method of distributing AIR files is through download, although they can also be sent via email or CD-ROM. Adobe AIR is a program that lets you open AIR files on Windows.