7za
Section: User Commands (1)
Updated: March 6th, 2016
Page Index
NAME
7za - A file archiver with high compression ratio format
SYNOPSIS
7za
<command>
[
<switches>... ]
<archive_name>
[
<file_names>... ]
[
<@listfiles>... ]
DESCRIPTION
7-Zip is a file archiver supporting 7z (that implements LZMA compression algorithm
featuring very high compression ratio), LZMA2, XZ, ZIP, Zip64, CAB,
RAR (it was removed due a non-free license), ARJ, GZIP, BZIP2, TAR, CPIO, RPM, ISO,
most filesystem images 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 fewer archive formats than
7z(1).
COMMANDS
- a
-
Add files to archive
- b
-
Benchmark
- d
-
Delete files from archive
- e
-
Extract files from archive (without using directory names)
- h
-
Calculate hash values for files
- i
-
Show information about supported formats
- l
-
List contents of archive
- rn
-
Rename files in archive
- t
-
Test integrity of archive
- u
-
Update files to archive
- x
-
eXtract files with full paths
SWITCHES
- --
-
Stop switches parsing
- -ai[r[-|0]]{@listfile|!wildcard}
-
Include archives
- -ax[r[-|0]]{@listfile|!wildcard}
-
Exclude archives
- -ao{a|s|t|u}
-
Set Overwrite mode
- -an
-
Disable archive_name field
- -bb[0-3]
-
Set output log level
- -bd
-
Disable progress indicator
- -bs{o|e|p}{0|1|2}
-
Set output stream for output/error/progress line
- -bt
-
Show execution time statistics
- -i[r[-|0]]{@listfile|!wildcard}
-
Include filenames
- -m{Parameters}
-
Set Compression Method (see /usr/share/doc/p7zip/DOC/MANUAL/cmdline/switches/method.htm from the p7zip-full package for a list of methods)
- -o{Directory}
-
Set Output directory
- -p{Password}
-
Set Password (NOTE: this flag does not work with 7zr)
- -r[-|0]
-
Recurse subdirectories (CAUTION: this flag does not do what you think, avoid using it)
- -sa{a|e|s}
-
Set archive name mode
- -scc{UTF-8|WIN|DOS}
-
Set charset for for console input/output
- -scs{UTF-8|UTF-16LE|UTF-16BE|WIN|DOS|{id}}
-
Set charset for list files
- -scrc[CRC32|CRC64|SHA1|SHA256|*]
-
Set hash function for x, e, h commands
- -sdel
-
Delete files after compression
- -seml[.]
-
Send archive by email
- -sfx[{name}]
-
Create SFX archive
- -si[{name}]
-
Read data from stdin (e.g. tar cf - directory | 7za a -si directory.tar.7z)
- -slp
-
Set Large Pages mode
- -slt
-
Show technical information for l (List) command
- -snh
-
Store hard links as links
- -snl
-
Store symbolic links as links
- -sni
-
Store NT security information
- -sns[-]
-
Store NTFS alternate streams
- -sfx[{name}]
-
Create SFX archive
- -so
-
Write data to stdout (e.g. 7za x -so directory.tar.7z | tar xf -)
- -spd
-
Disable wildcard matching for file names
- -spe
-
Eliminate duplication of root folder for extract command
- -spf
-
Use fully qualified file paths
- -ssc[-]
-
Set sensitive case mode
- -ssw
-
Compress shared files
- -stl
-
Set archive timestamp from the most recently modified file
- -stm{HexMask}
-
Set CPU thread affinity mask (hexadecimal number)
- -stx{Type}
-
Exclude archive type
- -t{Type}
-
Set type of archive
- -u[-][p#][q#][r#][x#][y#][z#][!newArchiveName]
-
Update options
- -v{Size}[b|k|m|g]
-
Create volumes
- -w[path]
-
Set working directory. Empty path means a temporary 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
7zr(1),
7z(1),
p7zip(1),
bzip2(1),
gzip(1),
zip(1),
HTML Documentation
/usr/share/doc/p7zip-full/DOC/MANUAL/start.htm
AUTHOR
- Written for Debian by Mohammed Adnene Trojette. Updated by Robert Luberda.
-