A: 4K â also known as UHD (more on this in the next answer!) â is a picture technology that quadruples the number of pixels found in a full HD picture. These pixels are usually arranged in a 3,840 x 2,160 configuration, compared with the 1920x1080 you get in a full HD TV.
Files with the .7z extension are very similar to Zip files. These files are compressed archive files, usually created by the 7-Zip file archive utility. 7Z files can make it easier to send files and folders over email and the Web.
The Linux tar utility is the preferred tool for building and extracting files from archives. The archives are referred to as âtarballsâ. tar -cvzf archname.tgz file... where archname is an arbitrary name, and each file can be either an ordinary file or a directory.