7-Zip – An excellent archive compressor / decompressor

7-zip is a file compressor with a high ratio of compression. The main features are:

  • High ratio of compression (LZMA algorithm)
  • Compress / decompress: 7z, ZIP, GZIP, BZIP2 and TAR
  • Unzip: ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z
  • Robust encryption: AES-256 for 7z and ZIP formats
  • Allows to create self-extracting archives (SFX)
  • Command line version
  • Integration with File Roller, XArchiver and XArchive
  • Multi-platform
  • Multi-language

p7zip is a port of 7-Zip for Unix

Install p7zip

Fedora

# yum -y install pzip p7zip-plugins

Debian / Ubuntu

# apt-get install p7zip-full 
Synopsis
$ 7z <commands> [] [ - ] [switch] <archive-name> <arguments> [ficheros a compactar]
  • Commands
  • a: Add files to archive
  • b: Benchmark
  • d: deletes files from the archive
  • l: list the contents of the archive
  • t: integrity verification
  • u: update files in the archive
  • x: extract files while keeping the directory structure
  • switch (all are not exposed for more info type 7z –help)
  • -m {parameters}: sets the compression method
  • -mhe = on|off: enables / disables encryption (only for 7z format)
  • -o: directory where is to unpack the files, by default the current directory
  • -p {password}: sets password
  • -sfx: creates self-extracting files
  • -si: Gets the data from the standard output
  • -so: dumps data to the standard output
  • -slt: shows technical information for the command l (list)
  • -t: Set type of archive
  • -v {Size}[b|k|m|g]: creating volumes
  • -y: assume Yes in all queries

Examples

Maximum compression, lzma method
$ 7z a -t7z -m0=lzma -mx=9 flossblog.7z flossblog
  • Where:
  • -t7z: 7z format
  • -m0=lzma: LZMA method
  • -mx=9: maximum level of compression
Unzip flossblog.7z to your projects directory
$ 7z x flossblog.7z -oproyectos
Self-extracting
$ 7z a -sfx flossblog.exe flossblog

In order to run the self-extracting type

$ ./flossblog.exe
Create volumes
$ 7z a -v1M flossblog.7z flossblog
Encrypt data and header
$ 7z a -mhe=on -pmy-passwd flossblog.7z flossblog
Further reading

P7ZIP project




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