7zip command line usage Summary

Usage: 7za <command> [<switches>...] <archive_name> [<file_names>...]
[<@ Listfiles...>]

1. "a", add a file
7z a-t7z files.7z *. txt

2. "d": delete an object
7z d archive.zip *. bak-r
Delete all *. bak files from the zip file

3. "e", extract
7z e archive.zip

4. "l": List objects
7z l archive.zip

5. "t", test integrity
7z t archive.zip *. doc-r

6. "u", update
7z u archive.zip *. d

7. "x", same as e, but keep full path

8. "m", specifying the optimization level
Compression switch:-mx0
What it means: Don't compress at all.
Is called "copy mode ."

Compression switch:-mx1
What it means: Very low compression.
It is called "fastest" mode.

Compression switch:-mx3
What it means: Fast compression mode.
Will set various parameters automatically.

Compression switch:-mx5
What it means: Same as abve, but "normal ."

Compression switch:-mx7
What it means: "maximum" compression.

Compression switch:-mx9
What it means: "ultra" compression.
(You probably want to use this .)

9. "-m" Options:
Switch:-mfb
Function: Specifies # of fast bytes.
Sometimes help with very "sparse" files.
Don't bother.

Switch:-mpass
Function: Number of passes for deflate compression.
Don't bother with this.
Automatically set with levels.

Switch:-md
Function: Specifies dictionary size.
Automatically set, so don't bother.

Switch:-MT
Function: Enable multithreading.
Use if: you have quad-core and a really huge archive.
Specify "on" or "off ".
This may be enabled by default; check the help file.

10. "-t" option
Specify the compressed file type
Type switch:-t7z
Format: 7Z
Example filename: archive.7z (default option)

Type switch:-tgzip
Format: GZIP
Example filename: archive.gzip
Archive.gz

Type switch:-tzip
Format: ZIP
Example filename: archive.zip (very compatible)

Type switch:-tbzip2
Format: BZIP2
Example filename: archive.bzip2

Type switch:-ttar
Format: TAR
Example filename: tarball.tar (UNIX and Linux)

Type switch:-tiso
Format: ISO
Example filename: image. iso

Type switch:-tudf
Format: UDF
Example filename: disk. udf

7z a-tiso archive. iso
7z a-tudf archive. udf

7z: executable name
A: add to archive
-Tiso or-tudf: format of archive to create
Archive. iso or archive. udf: name of archive to create

10. Hard Compression
Switch:-ms = on
Function: Enable solid mode.
This is the default so you won't often need this.

Switch:-ms = off
Function: Disable solid mode.
This is useful when you need to update individual files.
Will reduce compression ratios normally.

11. "-p" set the password
7z a pw.7z *. txt-signature cret

12. Other options:
Switch:-ssc
Function: Specify case-sensitive mode.
Useful for going between Linux and Windows.
Default:-ssc-on Windows (insensitive)
Default:-scc on Linux (sensitive)

Switch:-ssw
Function: Compress locked files.
Use if: you have problems with opening files.

Switch:-w
Function: Set working directory.
Use when you want to specify temp folders.

Switch:-aoa
Overwrite all destination files.

Switch:-aos
Skip over existing files without overwriting.
Use this for files where the earliest version is most important.

Switch:-aou
Avoid name collisions.
New files extracted will have a number appending to their names.
(You will have to deal with them later .)

Switch:-aot
Rename existing files.
This will not rename the new files, just the old ones already there.
Use when the new files are more important.

7z x test.zip-aoa

7z: use the 7-zip executable
X: use the extract command
Test.zip: extract files from this archive

-Aoa: overwrite all existing files. risky!