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7za(1)									7za(1)

NAME
       7za - A file archiver with highest compression ratio

SYNOPSIS
       7za [adeltux] [-] [SWITCH] <ARCHIVE_NAME> <ARGUMENTS>...

DESCRIPTION
       7-Zip  is  a file archiver with the highest compression ratio. The pro‐
       gram supports 7z (that implements  LZMA	compression  algorithm),  ZIP,
       CAB,  ARJ,  GZIP,  BZIP2,  TAR,	CPIO, RPM and DEB formats. Compression
       ratio in the new 7z format is 30-50% better than ratio in ZIP format.

       7za is a stand-alone executable. 7za handles less archive formats  than
       7z, but does not need any others.

FUNCTION LETTERS
       a      Add

       d      Delete

       e      Extract

       l      List

       t      Test

       u      Update

       x      eXtract with full paths

SWITCHES
       -ai[r[-|0]]{@listfile|!wildcard}
	      Include archives

       -ax[r[-|0]]{@listfile|!wildcard}
	      eXclude archives

       -bd    Disable percentage indicator

       -i[r[-|0]]{@listfile|!wildcard}
	      Include filenames

       -l     don't  store symlinks; store the files/directories they point to
	      (CAUTION : the scanning stage can never end because of recursive
	      symlinks like 'ln -s .. ldir')

       -m{Parameters}
	      Set   Compression	  Method  (see	/usr/share/doc/p7zip/DOCS/MAN‐
	      UAL/switches/method.htm for a list of methods)

       -mhe=on|off
	      7z format only : enables or disables archive  header  encryption
	      (Default : off)

       -o{Directory}
	      Set Output directory

       -p{Password}
	      Set Password

       -r[-|0]
	      Recurse  subdirectories (CAUTION: this flag does not do what you
	      think, avoid using it)

       -sfx[{name}]
	      Create SFX archive

       -si    Read data from StdIn (eg: tar cf - directory | 7za a -si	direc‐
	      tory.tar.7z)

       -so    Write data to StdOut (eg: % echo foo | 7z a dummy -tgzip -si -so
	      > /dev/null)

       -slt   Sets technical mode for l (list) command

       -t{Type}
	      Type of archive (7z, zip, gzip,  bzip2  or  tar.	7z  format  is
	      default)

       -v{Size}[b|k|m|g]
	      Create volumes

       -u[-][p#][q#][r#][x#][y#][z#][!newArchiveName]
	      Update options

       -w[path]
	      Set Working directory

       -x[r[-|0]]]{@listfile|!wildcard}
	      Exclude filenames

       -y     Assume Yes on all queries

DIAGNOSTICS
       7-Zip returns the following exit codes:

	      0	     Normal (no errors or warnings detected)

	      1	     Warning  (Non  fatal  error(s)).  For example, some files
		     cannot be read during compressing. So they were not  com‐
		     pressed

	      2	     Fatal error

	      7	     Bad command line parameters

	      8	     Not enough memory for operation

	      255    User stopped the process with control-C (or similar)

Backup and limitations
       DO NOT USE the 7-zip format for backup purpose on Linux/Unix because :
	- 7-zip does not store the owner/group of the file.

       On Linux/Unix, in order to backup directories you must use tar :
	-  to  backup  a  directory   :	 tar cf - directory | 7za a -si direc‐
       tory.tar.7z
	- to restore your backup : 7za x -so directory.tar.7z | tar xf -

       If you want to send files and directories (not the owner	 of  file)  to
       others Unix/MacOS/Windows users, you can use the 7-zip format.

	 example : 7za a directory.7z  directory

       Do not use "-r" because this flag does not do what you think.

       Do  not	use directory/* because of ".*" files (example : "directory/*"
       does not match "directory/.profile")

EXAMPLE 1
       7za a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on archive.7z dir1
	      adds all files from directory "dir1" to archive archive.7z using
	      "ultra settings"

       -t7z   7z archive

       -m0=lzma
	      lzma method

       -mx=9  level of compression = 9 (Ultra)

       -mfb=64
	      number of fast bytes for LZMA = 64

       -md=32m
	      dictionary size = 32 megabytes

       -ms=on solid archive = on

EXAMPLE 2
       7za a -sfx archive.exe dir1
	      add  all	files from directory "dir1" to SFX archive archive.exe
	      (Remark : SFX archive MUST end with ".exe")

EXAMPLE 3
       7za a -mhe=on -pmy_password archive.7z a_directory
	      add all files from directory "a_directory" to the	 archive  "ar‐
	      chive.7z" (with data and header archive encryption on)

SEE ALSO
       7z(1), 7zr(1), bzip2(1), gzip(1), zip(1)

HTML Documentation
       /usr/share/doc/p7zip/DOCS/MANUAL/index.htm

AUTHOR
       Written for Debian by Mohammed Adnene Trojette.

Mohammed Adnene Trojette       September 1 2006				7za(1)
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