-ssc (Set Sensitive Case mode) switch

Sets sensitive case mode for file names.

Syntax

-scs[-]

Switch	Description
-ssc	Set case-sensitive mode. It's default for Posix/Linux systems.
-ssc-	Set case-insensitive mode. It's default for Windows systems.

Example

7z a archive.7z A*.txt -ssc -r

compresses all A*.txt files from current directory and all it's subdirectories. That command doesn't compress a*.txt files.

Commands that can be used with this switch

a (Add), d (Delete), e (Extract), l (List), t (Test), u (Update), x (Extract with full paths)

Notes from this site

Not part of the 7-Zip manual. Written by this site; examples checked with 7-Zip 26.04.

Which switch: -ssc, not -scs

The syntax line above has a typo. The real switch is -ssc or -ssc-. -scs is a different switch (charset): in our test 7zz a s.7z 'A*.txt' -scs -r stopped with "Unsupported charset".

Default: case-sensitive on Linux and macOS, case-insensitive on Windows. The switch affects the names and wildcards you type on the command line (-i, -x, file filters, literal names too), including when you list, extract, test or delete archive entries. It does not change how your disk treats names.

Quick examples

The official Linux/macOS console binary is 7zz; on Windows use 7z. On Linux/macOS quote wildcards.

# Linux/macOS: add readme.md, README.txt and sub/Readme.MD
7zz a backup.7z 'readme*' -ssc- -r

# list or extract README in any case from an archive
7zz l backup.7z -ssc- 'readme*' -r
7zz x backup.7z -ssc- 'readme*' -r

# a literal name matches in any case too (finds README.TXT)
7zz x backup.7z -ssc- readme.txt

# force case-sensitive: A*.txt only, not a*.txt (already the default on
# Linux/macOS; on Windows you need -ssc)
7zz a a.7z 'A*.txt' -ssc -r

:: Windows cmd.exe, same vendor example
7z a backup.7z A*.txt -ssc -r

In our test the first command stored all three files, and the -ssc one stored A1.txt and sub/A3.txt but not a2.txt. The literal readme.txt listed README.TXT with -ssc- and nothing without it.

Common mistakes

Unquoted wildcards on Linux/macOS are expanded by the shell first, so 7-Zip never sees the pattern.
Matching both cases in the archive does not make the disk case-insensitive: entries that differ only in case, such as readme and README in one folder, extracted into one file on macOS in our test.