GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  7ZA (1)

NAME

7za - A file archiver with highest compression ratio

CONTENTS

Synopsis
Description
Function Letters
Switches
Diagnostics
Backup and limitations
Example 1
Example 2
Example 3
Author

SYNOPSIS

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

DESCRIPTION

7-Zip is a file archiver with the highest compression ratio. The program 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/local/share/doc/p7zip/MANUAL/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 directory.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 compressed
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 directory.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 "archive.7z" (with data and header archive encryption on)

SEE ALSO

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

HTML Documentation

/usr/local/share/doc/p7zip/MANUAL/index.htm

AUTHOR

Written for Debian by Mohammed Adnene Trojette.
 
Search for    or go to Top of page |  Section 1 |  Main Index


Mohammed Adnene Trojette 7ZA (1) September 1 2006

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.