How to protect files & folders with password in Linux

only for file protection

gpg  –c  abc.tar

gpg abc.tar

protection for file & Folder both 

zip  –e  -r  <dir name>   <zip dir name which must be same as dir name> 

zip  -e  -r  yy yy

unzip –a yy.zip

Hide a file or folder in Linux

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Just rename the file or folder with prefix dot i.e

Eg:

File name or folder name is hello

#mv  hello  .hello

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You can password protect a zip file. Proceed as follows:

Create a directory for this experiment, and name it test.

Copy a few files and paste them into this directory so it isn't empty.

Now open a terminal and enter:

$ zip -e -r test test

Enter password:

Verify password:

Delete the directory test.

Now you have a file test.zip which is password protected.

zip with -e option encrypts the contents of the zip archive using a password. This encrypts with standard pkzip encryption which is considered weak.

However, the job of protecting the file is done, because even the root user needs the password to decrypt.