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Extract tar.gz

Operating systems : Linux

Extracting tar.gz files in Linux, command line:

tar zxvf file.tar.gz

- z : filter the archive through gzip [ 1 ]

- x : extract files from an archive

- v : list the files processed

- f : use archive file

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

Tar creates an archive of one or several files. Then gzip 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 compressed after - is reflected in the extension of the file ("tar.gz") and requires two procedures to be performed while extracting: decompressing and unpacking. Hence both z (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

 

Windows console applications

 

Some time ago text-based applications were the only form of software of average end user computer experience. As well as after the graphical user interface programs started to become widespread, console applications used to retain their strong positions. But gradually GUI software virtually superseded text-based applications in daily use of the average end user. However, even now there are console programs that can more or less compete with software of graphical user interface, be useful for the average user to solve various problems and fulfill numerous tasks on modern computers. Windows console applications. File managers Windows console applications. Multimedia Windows console applications. Web browsers Windows console applications. Text editors Besides file managers, multimedia programs, text editors, web browsers, there are plenty of other text-based programs and utilities for use under Windows: both standalone and those included in MS Windows distributions. For example, ipconfig and netstat for work with network, Windows built-in FTP client useful for some tasks, CommandBurner for command line burning CD / DVD or cdburn with dvdburn from Windows Server 2003 Support Tools for the same, etc.

HTML centering

 

Centering the whole content of a web page in the viewable area of a browser by pure HTML - no CSS. A box to keep the content of the page is HTML centered horizontally and vertically - [ Open demo page ] HTML. Code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>HTML centering</title> <meta http-equiv="Content-Type" content="text/html; charset=Windows-1252"> </head> <body bgcolor="#ffffff"> <table width="100%" height="100%" bgcolor="#a3ddc4"> <tr> <td align="center"> <table width="800" height="500" bgcolor="#ff6f6f"> <tr> <td>&nbsp;</td> </tr> </table> </td> </tr> </table> </body> </html> The outer HTML table makes the whole web browser viewable area, except margins, a HTML table and the whole area of this HTML table - a HTML table cell. The cell of the outer HTML table inherits the default value for valign attribute from its parent table row. And this row in its turn inherits the default value for valign attribute from the outer HTML table tbody - even if tbody tag is not used. And that value is middle. So a block of content inside the cell of the outer HTML table is centered vertically in web browser viewable are. Align="center" of the outer HTML table cell makes a block of content inside it centered horizontally in web browser viewable are. The inner table, the one inside of the outer HTML table cell makes up a box of a given size. Or there may be no set height or no set width or both. Then the size of the box is to adjust to accommodate the content, whatever its dimensions are. If the width or height or both of the box results to be larger than web browser viewable area, then it still ends up to be centered. Since HTML centering is the oldest method to center content horizontally and vertically, it works well not just in older web browsers, but in ones that can be described as downright ancient. Like adding one more HTML tag ( <center></center> ) around the outer table makes it funcion as deep as Internet Explorer 3 : [ Open demo page ] Download Internet Explorer 3: a pack, containing 3.0, 4.01, 5.01, 5.5, 6.0 versions of Internet Explorer HTML.