7z
(1)
Name
7z - A file archiver with highest compression ratio
Synopsis
7z [adeltux] [-] [SWITCH] <ARCHIVE_NAME> <ARGUMENTS>...
Description
User Commands 7z(1)
NAME
7z - A file archiver with highest compression ratio
SYNOPSIS
7z [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.
7z uses plugins to handle archives.
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/MANUAL/switches/method.htm
for a list of methods)
-mhe=on|off
Mohammed Adnene TrLasttchange: September 1 2006 1
User Commands 7z(1)
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 | 7z 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
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User Commands 7z(1)
7 Bad command line parameters
8 Not enough memory for operation
255 User stopped the process with control-C (or simi-
lar)
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
7z a -t7z -m0=lzma -mx=9 -mfb=64
adds all files from directory "dir1" to archive ar-
chive.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
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User Commands 7z(1)
-ms=on
solid archive = on
EXAMPLE 2
7z a -sfx archive.exe dir1
add all files from directory "dir1" to SFX archive ar-
chive.exe (Remark : SFX archive MUST end with ".exe")
EXAMPLE 3
7z a -mhe=on -pmy_password archive.7z a_directory
add all files from directory "a_directory" to the ar-
chive "archive.7z" (with data and header archive
encryption on)
ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | compress/p7zip |
+---------------+------------------+
|Stability | Committed |
+---------------+------------------+
SEE ALSO
7za(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.
NOTES
This software was built from source available at
https://java.net/projects/solaris-userland. The original
community source was downloaded from http://down-
loads.source-
forge.net/project/p7zip/p7zip/9.20.1/p7zip_9.20.1_src_all.tar.bz2
Further information about this software can be found on the
open source community website at http://p7zip.source-
forge.net/.
Mohammed Adnene TrLasttchange: September 1 2006 4