How can I compress two folders into archive file (zip, gzip or something like that) with a password on the files?

For example I have folder structure:

  • rootDir
    • dir1
    • dir2
    • dir3
    • dir4

I need bash command to add dir2 and dir4 to same archive file compressed with a password on it.

2 Answers 2

zip -er filename.zip dir2 dir4

The zip command is widely available; if not on your system, look for a zip package or similar.

The -e flag specifies encryption is to be used on the zipfile; you'll be prompted for a password.

The -r flag specifies recursion; all the files in dir2 and dir4 will be included.

The resulting zipped, encrypted file containing dir2 and dir4 will be placed at filename.zip.

  • This is good, how do I do it for all folders , files and subfolders (recursive) ? And another question, how do I provide password without prompt ? Sep 10, 2009 at 18:01
  • 2
    so the answer I was looking for is: zip -rP "password" filename.zip dir2 dir4 Sep 10, 2009 at 18:42
  • 1
    Note however, that zip's built-in encryption is fairly insecure: math.ucr.edu/~mike/zipattacks.pdf . If you want more than protection from casual peeping, use a real encryption software (such as GnuPG or TrueCrypt).
    – sleske
    Jan 4, 2010 at 11:25

Compress with your favorite unix command (mine is 'tar cfj' for a BZip2 tarball).
Then encrypt with bcrypt.

Bcrypt is a cross platform file encryption utility.

But, they say bcrypt is no longer safe (! ;-)),
Well, change to TrueCrypt (it too is cross platform -- easycrypt).

Tip: Encryption after compression makes life much more interesting.

  • what do you mean by "more interesting"?
    – Tebe
    Jul 25, 2015 at 14:16
  • 1
    This approach is interesting, as it will hide the file list in the compressed file, unlike zipped file. Oct 19, 2016 at 4:28

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