Information:
7-Zip is an open source file archiver with the high compression ratio predominantly for the Microsoft Windows operating system. It operates either as a command line program or with a graphical user interface. It also features integration with the Windows shell environment. 7-Zip is free software, developed by Igor Pavlov and distributed under the GNU LGPL license. For ZIP and GZIP formats, 7-Zip provides acompression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip. The main features:
• High compression ratio in new 7z format with LZMA compression
• Strong AES-256 encryption in 7z and ZIP formats
• Self-extracting capability for 7z format
• Integration with Windows Shell
• Powerful File Manager
• Powerful command line version
• Plugin for FAR Manager
• Localizations for 74 languages
• Supported formats:
- Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
- Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, MSI, WIM, Z, CPIO, RPM, DEB and NSIS
• Strong AES-256 encryption in 7z and ZIP formats
• Self-extracting capability for 7z format
• Integration with Windows Shell
• Powerful File Manager
• Powerful command line version
• Plugin for FAR Manager
• Localizations for 74 languages
• Supported formats:
- Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
- Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, MSI, WIM, Z, CPIO, RPM, DEB and NSIS
Changes in version 9.31 Alpha, 2013-11-29:
- 7-Zip now can create multivolume SFX archives in 7z format.
- ZIP, NSIS, HFS, AR support was improved.
- 7-Zip now supports files larger than 4 GiB in ISO archives
- Improved compression ratio in 7z format with maximum or ultra level for executable files (EXE and DLL) that are larger than 16 MB (improved BCJ2 filter).
- Improved support for file pathnames longer than 260 characters.
- CRC and SHA checksum calculation for files can be called via Explorer’s context menu.
- 7-Zip File Manager now also takes into account the numbers in filenames for sorting order.
- 7-Zip File Manager can open files in “Parser” mode via “Open Archive > #” context menu command. It shows the list of archives inside file.
- Command line version:
# # new -t# switch to open file in “Parser” mode and show the list of archives inside file.
# # new -stx{Type} switch to exclude archive type from using.
# # -scs switch now supports UTF-16 encoding.
- The BUGs were fixed:
# # 7-Zip 9.30 and early versions created ZIP archives with minor errors in extra field of headers for directory items, if AES (WinZip-AES) encryption was used.
# # 7-Zip could work incorrectly in decompression of more than one multi-volume archive in one command.
# # 7-Zip 9.24 alpha – 9.30 alpha versions could not extract ZIP archives encrypted with PKWARE-AES method.
- Minimum supported system now is Windows 2000. 7-Zip does not work on Windows 95/98/ME.
- New localization: Irish.
- 7-Zip now can create multivolume SFX archives in 7z format.
- ZIP, NSIS, HFS, AR support was improved.
- 7-Zip now supports files larger than 4 GiB in ISO archives
- Improved compression ratio in 7z format with maximum or ultra level for executable files (EXE and DLL) that are larger than 16 MB (improved BCJ2 filter).
- Improved support for file pathnames longer than 260 characters.
- CRC and SHA checksum calculation for files can be called via Explorer’s context menu.
- 7-Zip File Manager now also takes into account the numbers in filenames for sorting order.
- 7-Zip File Manager can open files in “Parser” mode via “Open Archive > #” context menu command. It shows the list of archives inside file.
- Command line version:
# # new -t# switch to open file in “Parser” mode and show the list of archives inside file.
# # new -stx{Type} switch to exclude archive type from using.
# # -scs switch now supports UTF-16 encoding.
- The BUGs were fixed:
# # 7-Zip 9.30 and early versions created ZIP archives with minor errors in extra field of headers for directory items, if AES (WinZip-AES) encryption was used.
# # 7-Zip could work incorrectly in decompression of more than one multi-volume archive in one command.
# # 7-Zip 9.24 alpha – 9.30 alpha versions could not extract ZIP archives encrypted with PKWARE-AES method.
- Minimum supported system now is Windows 2000. 7-Zip does not work on Windows 95/98/ME.
- New localization: Irish.
Some BUGs of 7-Zip 9.31 alpha were fixed:
- 7-Zip could not unpack some RAR archives
- 7-Zip File Manager could work incorrectly for unpacking from solid archives, if archive was open in 7-Zip File Manager. Also 7-Zip File Manager could leave some unpacked files in TEMP folder of Windows. So look your TEMP folder and remove folders that have “7z” prefix in name.
- 7-Zip could not unpack some RAR archives
- 7-Zip File Manager could work incorrectly for unpacking from solid archives, if archive was open in 7-Zip File Manager. Also 7-Zip File Manager could leave some unpacked files in TEMP folder of Windows. So look your TEMP folder and remove folders that have “7z” prefix in name.
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