zip is a nice, cross-platform compression software, similar in purpose to WinZip or GZip. &zip can create and extract those .zip and .gz (and tar.gz) files, but it uses LZMA for its own native compression, which is a much more modern compression format. (if you’re using .rar, please stop already).
Use 7zip to create a password-protected file of a list of files and directories; note the flags -p -mhe which are REQUIRED for the password part to function! 7zip uses AES encryption with 256-bit keys, so this encryption isn’t joking around.
Some basic command-line examples for using 7zip are listed below, which is run with either 7z or 7za on a GNU/Linux system, the 7za being a bit less capable but also has fewer dependencies.
To Archive the files and folders ‘test/ test2/ file1 file2’
shell$ 7z a -t7z -p -mhe out-file.7z test/ test2/ file1 file2
Scanning
Updating archive out-file.7z
Enter password (will not be echoed) :
Verify password (will not be echoed) :
Everything is Ok
To List the files:
shell$ 7z l out-file.7z
And to Extract the files:
shell$ 7z e out-file.7x
More Details : http://www.dotnetperls.com/7-zip-examples
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