Security is important, we all know, and to protect files in Linux Operating System machines is really easy.
The files can be password protected, so you can carry them in a flash memory, and if you loose the flash, you do not have to worry about your info, as it will not be readable.
To encrypt a file in Linux we will use, gpg which is parte of the GnuPG.
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Syntax of gpg
gpg -c filename.ext
Let's imagine we have a file called my-personal-info.txt
I want to encrypt with a password to protect the file, run this command.
gpg -c my-personal-info.txt
The output of the command is:
$ gpg -c my-personal-info.txt
Enter passphrase:
Enter a good passphrase, be sure to remember it, and do not use an easy one.
Then you will get
Repeat passphrase:
Now gpg has created an encrypted file called my-personal-info.txt.gpg, the original file is still there, so you may want to erase it, or only transport the encrypted one, or send by email the encrypted one.
To decrypt a file just enter this command.
gpg my-personal-info.txt.gpg
You will be asked for the password or passphrase, and the file will be recreated.
Protect your data.
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