Month: January 2019

The Rite of Spring – Wikipedia

Jovan Stosic January 23, 2019

https://ris.mk/wordpress/wp-content/uploads/2019/01/NikolaiRoerichRite1.jpg

The Rite of Spring (French: Le Sacre du printemps; Russian: Весна священная, translit. Vesna svyashchennaya, lit. ‘sacred spring’) is a ballet and orchestral concert work by Russian composer Igor Stravinsky. It was written for the 1913 Paris season of Sergei Diaghilev’s Ballets Russes company; the original choreography was by Vaslav Nijinsky with stage designs and costumes by Nicholas Roerich. When first performed at the Théâtre des Champs-Élysées on 29 May 1913, the avant-garde nature of the music and choreography caused a sensation. Many have called the first-night reaction a “riot” or “near-riot,” though this wording did not come about until reviews of later performances in 1924, over a decade later.[1][2] Although designed as a work for the stage, with specific passages accompanying characters and action, the music achieved equal if not greater recognition as a concert piece and is widely considered to be one of the most influential musical works of the 20th century.

Stravinsky was a young, virtually unknown composer when Diaghilev recruited him to create works for the Ballets Russes. The Rite was the third such project, after the acclaimed Firebird (1910) and Petrushka (1911). The concept behind The Rite of Spring, developed by Roerich from Stravinsky’s outline idea, is suggested by its subtitle, “Pictures of Pagan Russia in Two Parts”; the scenario depicts various primitive rituals celebrating the advent of spring, after which a young girl is chosen as a sacrificial victim and dances herself to death. After a mixed critical reception for its original run and a short London tour, the ballet was not performed again until the 1920s, when a version choreographed by Léonide Massine replaced Nijinsky’s original. Massine’s was the forerunner of many innovative productions directed by the world’s leading ballet-masters, gaining the work worldwide acceptance. In the 1980s, Nijinsky’s original choreography, long believed lost, was reconstructed by the Joffrey Ballet in Los Angeles.

Stravinsky’s score contains many novel features for its time, including experiments in tonality, metre, rhythm, stress and dissonance. Analysts have noted in the score a significant grounding in Russian folk music, a relationship Stravinsky tended to deny. The music influenced many of the 20th-century’s leading composers and is one of the most recorded works in the classical repertoire.
Source: The Rite of Spring – Wikipedia

The Rite of Spring – Wikipedia was last modified: January 23rd, 2019 by Jovan Stosic

Squid – Proxy Server

Jovan Stosic January 22, 2019

Squid is a full-featured web proxy cache server application which provides proxy and cache services for Hyper Text Transport Protocol (HTTP), File Transfer Protocol (FTP), and other popular network protocols. Squid can implement caching and proxying of Secure Sockets Layer (SSL) requests and caching of Domain Name Server (DNS) lookups, and perform transparent caching. Squid also supports a wide variety of caching protocols, such as Internet Cache Protocol (ICP), the Hyper Text Caching Protocol (HTCP), the Cache Array Routing Protocol (CARP), and the Web Cache Coordination Protocol (WCCP).

The Squid proxy cache server is an excellent solution to a variety of proxy and caching server needs, and scales from the branch office to enterprise level networks while providing extensive, granular access control mechanisms, and monitoring of critical parameters via the Simple Network Management Protocol (SNMP). When selecting a computer system for use as a dedicated Squid caching proxy server for many users ensure it is configured with a large amount of physical memory as Squid maintains an in-memory cache for increased performance.

Installation
Configuration
References

Installation

At a terminal prompt, enter the following command to install the Squid server:

sudo apt install squid

Configuration

Squid is configured by editing the directives contained within the /etc/squid/squid.conf configuration file. The following examples illustrate some of the directives which may be modified to affect the behavior of the Squid server. For more in-depth configuration of Squid, see the References section.

Prior to editing the configuration file, you should make a copy of the original file and protect it from writing so you will have the original settings as a reference, and to re-use as necessary. Make this copy and protect it from writing using the following commands:

sudo cp /etc/squid/squid.conf /etc/squid/squid.conf.original
sudo chmod a-w /etc/squid/squid.conf.original

To set your Squid server to listen on TCP port 8888 instead of the default TCP port 3128, change the http_port directive as such:

http_port 8888

Change the visible_hostname directive in order to give the Squid server a specific hostname. This hostname does not necessarily need to be the computer’s hostname. In this example it is set to weezie

visible_hostname weezie

Using Squid’s access control, you may configure use of Internet services proxied by Squid to be available only users with certain Internet Protocol (IP) addresses. For example, we will illustrate access by users of the 192.168.42.0/24 subnetwork only:

Add the following to the bottom of the ACL section of your /etc/squid/squid.conf file:

acl fortytwo_network src 192.168.42.0/24

Then, add the following to the top of the http_access section of your /etc/squid/squid.conf file:

http_access allow fortytwo_network

Using the excellent access control features of Squid, you may configure use of Internet services proxied by Squid to be available only during normal business hours. For example, we’ll illustrate access by employees of a business which is operating between 9:00AM and 5:00PM, Monday through Friday, and which uses the 10.1.42.0/24 subnetwork:

Add the following to the bottom of the ACL section of your /etc/squid/squid.conf file:

acl biz_network src 10.1.42.0/24
acl biz_hours time M T W T F 9:00-17:00

Then, add the following to the top of the http_access section of your /etc/squid/squid.conf file:

http_access allow biz_network biz_hours

After making changes to the /etc/squid/squid.conf file, save the file and restart the squid server application to effect the changes using the following command entered at a terminal prompt:

sudo systemctl restart squid.service

If formerly a customized squid3 was used that set up the spool at /var/log/squid3 to be a mountpoint, but otherwise kept the default configuration the upgrade will fail. The upgrade tries to rename/move files as needed, but it can’t do so for an active mountpoint. In that case please either adapt the mountpoint or the config in /etc/squid/squid.conf so that they match.

The same applies if the include config statement was used to pull in more files from the old path at /etc/squid3/. In those cases you should move and adapt your configuration accordingly.

Squid – Proxy Server was last modified: January 22nd, 2019 by Jovan Stosic

Google Public DNS – Wikipedia

Jovan Stosic January 21, 2019

Google Public DNS is a free Domain Name System (DNS) service offered to Internet users worldwide by Google. It functions as a recursive name server.

Google Public DNS was announced on 3 December 2009,[1] in an effort described as “making the web faster and more secure”.[2][3] As of 2014, it is the largest public DNS service in the world, handling 400 billion requests per day.[4] Google Public DNS is not related to Google Cloud DNS, which is a DNS hosting service.

 

Source: Google Public DNS – Wikipedia

Google Public DNS – Wikipedia was last modified: January 21st, 2019 by Jovan Stosic