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.
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There are several programs for taking screenshots in DOS. SNARF, for instance. Using this application succeeded in taking screenshots in most of the cases. Also, the screenshots' quality (.BMP files) by SNARF results to be the highest among the programs tested: ScreenThief, VideoThief, FLIP, GRABBER, SNARF. Using SNARF with default settings is straightforward, but there is a shortcoming - SNARF always saves screenshots to the folder where the user is currently in. That could be inconvenient or unacceptable. And there is no obvious way to change it. But there is a roundabout option. The initial idea had been found on this page. The result based on it: 1. SNARF [ Download ] 2. Open SNARF.EXE in a text editor in text mode (not hex), find snarf000.bmp and replace it for s:scn000.bin 3. Create a batch file, S.BAT for example, where besides a string for starting SNARF.EXE will be a command assigning the path to the folder screenshots will be saved into to a virtual drive S: The folder and path may be any: C:\SOFT\SNARF.EXE SUBST S: C:\SCREENS\ 4. Start SNARF: S [or S.BAT] 5. To take a screenshot: Alt + S There will be two beeps. The first at the beginning and the second one as a sign the process has completed successfully. After the screenshots are taken, go to the folder where they are saved in and replace the file extensions from .BIN to .BMP SNARF - Freeware.
MPlayer : FFmpeg Media players appeared long ago, but their heyday began with the mass spread of personal computers powerful enough to play video files. This coincided with the mass spread of operating systems and other software with graphical user interface. However, a program with a graphical user interface is dualistic in its nature: there is a code responsible for graphical user interface, for the appearance and there is a code - for performing the task the given application has been created for in the first place. Both code complexes consume system resources, their response time to user actions makes up certain amount of waiting time. And in cases or concepts when appearance is taken as less important - less important to the point of sparing or almost sparing to employ it - console applications, among others, appear. Moreover, the segmentation of the GUI and of the engine makes it easier to change the graphical user interface or perform complex automated operations. The scheme is implemented for media players for Windows as well. MPlayer, for instance, in its usual form is a console application, starting up quickly, having fast response to user actions, consuming system resources almost entirely for its immediate task. And on this basis if desired, one or another graphical interface may be added for creating, all in all, a new application. MPlayer - / home page / Console media player for Windows. Basis for SMPlayer and UMPlayer. There are versions for Linux, FreeBSD, NetBSD, OpenBSD, Apple Darwin, Mac OS X, QNX, OpenSolaris/Solaris, Irix, HP-UX, AIX, some other *nix system, BeOS, Syllable, AmigaOS, AROS, MorphOS, DOS, Windows. Supported video, audio formats, static images, subtitles, etc. ( List and More extensive list of video and audio codecs ). MPlayer: "Dead Man" MPlayer: "Sky Captain and the World of Tomorrow" MPlayer: "10,000 BC" MPlayer: "13 Tzameti" MPlayer: "The Draughtsman's Contract" MPlayer: "Balzaminov's Marriage" FFmpeg - / home page / Pack of utilities and libraries for work with video and audio files. Created in and for Linux, but there is a Windows variant. Source code may be compiled for some other operating systems. Supported file formats and codecs: ( List ). Also, VLC media player can be run in text mode, ncurses using.