ZIP is a very popular compression and file packaging utility for Unix-like operating systems as well as Windows. While perusing through the zip man page, I discovered some useful options for protecting zip archives.
Read Also: How to Password Protect a Vim File in Linux
In this post, I will show you how to create a password protected zip file on the terminal in Linux. This will help you learn a practical way of encrypting and decrypting contents of zip archive files.
First install zip utility in your Linux distribution using the package manger as shown.
$ sudo yum install zip [On CentOS/RHEL] $ sudo dnf install zip [On Fedora 22+] $ sudo apt install zip [On Debian/Ubuntu]
How to Create Password Protected ZIP in Linux
Once installed, you can use the zip command with
-P flag to create a password protected zip archive called ccat-command.zip from the directory of files called ccat-1.1.0 as follows.
$ zip -p pass123 ccat-command.zip ccat-1.1.0/
Create Password Protected Zip File
However, the above method is absolutely insecure, because here the password is provided as clear-text on the command line. Secondly, it will also be stored in the history file (e.g ~.bash_history for bash), meaning another user with access to your account (more especially root user) will easily see the password.
Therefore, try to always use the
-e flag, it shows a prompt allowing you to enter a hidden password as shown.
$ zip -e ccat-command.zip ccat-1.1.0/
Create Password Protect Zip Archive
How to Unzip Password Protected ZIP in Linux
To unzip and decrypt the content of the archive file called ccat-command.zip, use the unzip program and provide the password you entered above.
$ unzip ccat-command.zip
Decrypt ZIP Archive
That’s It! In this post, I described how to create a password protected zip file on the terminal in Linux. If you have any queries, or other useful related tip/tricks to share, use the comment form below ping us.