Kompx.com or Compmiscellanea.com

Extract tar.bz2

Operating systems : Linux

Extracting tar.bz2 files in Linux, command line:

tar jxvf file.tar.bz2

- j : filter the archive through bzip2 [ 1 ]

- x : extract files from an archive

- v : list the files processed

- f : use archive file

The command extracts the contents of a bzip2 compressed archive to the current directory.

Tar creates an archive of one or several files. Then bzip2 is used to compress it. Or both processes are made at once by tar only, with corresponding options employed. The duality of nature - archived and then compressed - is reflected in the extension of the file ("tar.bz2") and requires two procedures to be performed while extracting: decompressing and unpacking. Hence both j (decompress it) and x (unpack it) in the command.


[ 1 ]

Sources for the option letters description: tar(1) - Linux man page and LinuxCommand.org


Aliosque subditos et thema

 

CSS for a range of elements

 

Styling a range of elements. Here from the 1st to the 3rd one - changing background color. Example:         HTML / XHTML. Code: <div>&nbsp;</div> <div>&nbsp;</div> <div>&nbsp;</div> <div>&nbsp;</div> CSS. Code: div:nth-of-type(-n+3) {background: #f66;} /* Extra CSS, just styling the look: */ div {width: 100%; margin-top: 5px; background: #066;} Note: nth-child may also be used instead.

CSS horizontal and vertical centering - 2

 

Centering the content of a web page in the viewable area of a browser by means of CSS. A box to contain the whole content of the page is CSS centered horizontally and vertically: [ Open demo page ] HTML / XHTML. Code: <!DOCTYPE html> <html> <head> <title>CSS horizontal and vertical centering - 2</title> <link rel="stylesheet" type="text/css" href="css.css" /> </head> <body> <div class="spacer">&nbsp;</div> <div class="wrapper"> <div class="pagecontent">&nbsp;</div> </div> </body> </html> CSS. Code: html {height: 100%; margin: 0px;} body height: 100%; margin: 0px;} .spacer {position: relative; top: 0px; left: 0px; height: 50%; width: 100px; float: left; margin: 0px 0px -250px 0px; background: #999;} .wrapper {position: relative; top: 0px; left: 0px; height: 500px; width: 100%; clear: both; background: #a3ddc4;} .pagecontent {position: relative; top: 0px; left: 0px; height: 500px; width: 800px; margin: 0 auto; background: #ff6f6f;} The .pagecontent box is for the page content. It must be of a fixed height and width in units like px's or em's - not in percents. Height and width may be larger than web browser viewable area, but here the more practical case is discussed - when the height and width of .pagecontent are smaller than those of the web browser viewable area. The .pagecontent box is horizontally centered by its "margin: 0 auto". .Wrapper creates a space where .pagecontent is centered horizontally. .Wrapper's width is 100% for centering at various web browser viewable area sizes. The height has to be equal to the one of .pagecontent. .Spacer centers .wrapper with .pagecontent in it vertically inside browser viewable area. Its width may be any. The height is 50% - that places the top edge of .pagecontent vertically in the middle of the browser viewable area. The bottom margin of .spacer equal to half the .pagecontent height centers .pagecontent and its contents vertically in the web browser viewable area of a current height. This method is reliable in all major modern web browsers. It also works in older browsers like Internet Explorer 6 or earlier versions of Maxthon. But the height of box for page content has to be assigned explicitly and if it is changed - the size of .spacer bottom margin must be changed accordingly as well. There is another way of CSS horizontal and vertical centering, with CSS code easier to maintain, even if not suitable for older web browsers: CSS horizontal and vertical centering - 1. [ 1 ] As well as Netscape 7.2+, Mozilla 1.5+. [ 2 ] As well as Netscape 7.2+, Mozilla 1.5+.