Ubuntu12.04 install the compression software 7z and ubuntu12.047z
Open the software sharing center, search for 7z, and install it.
Or on the terminal sudo apt-get install p7zip-full
Note: (from Baidu)
7-ZipIs an open-source software, most of the source code followsGNU LGPLLicense, with 7-Zip software, free of charge, is truly free and open. You can use 7-Zip on any computer, including computers for commercial purposes. If you do not donate or pay 7-Zip, it will not affect your use. ●Supported formats: ●Compression/Decompression: 7z, XZ, BZIP2, GZIP, TAR, ZIP, and WIM ●Extract only: ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, WIM, XAR, and 7Z ● For ZIP and GZIP formats, 7-Zip provides 2-10% higher compression ratio than PKZip and WinZip ● more sophisticated AES-256 encryption algorithms for 7z and ZIP ● 7z formats support creating self-release (SFX) compressed package ● Windows Resource Manager integrated ● powerful File Manager ● powerful command line version ● support for FAR Manager plug-in ● support for 79 languages ●7-ZipApplicable to Windows 7/Vista/XP/2008/2003/2000/NT/ME/98 and provides command line versions for Mac OS X, Linux, and Unix platforms.