In this howto, we will show you how to Install/Configure GPG (GNU Privacy Guard)

For CentOS:

Step 1  -Install

As root (su -, then the root password):

yum install gpg

(select y)

It will then install

Step 2 –Locate Program

Locate GPG on your system:

whereis gpg

You should get back:

gpg: /usr/bin/gpg

Step 3 –Change user rights

So everyone can use it:

chmod u+s /usr/bin/gpg

Step 4 –Create Files for GPG to Work

/usr/bin/gpg --gen-key [for root]

Step 5 –Configuring Key

Accept the defaults

Step 6- Verify

gpg --list-secret-key

gpg --list-public-key

gpg --list-sig

Step 7 – Create Revocation Certificate

gpg --output revoke.asc --gen-revoke your_email_name@your_service_provider.com [or ca, etc.]

Step 8 –Export Your Public Key

gpg --export --armor > yourname.asc

Step 9 – Import Someone Else’s Key

Download key

gpg --import arnoldSW.asc

Step 10 –Sign Downloaded Key

 gpg –signarnoldSW.asc

Create a Signature File

Example .. touch <yourname>
touch yourname

gpg –clearsign yourname

Decrypt Files

gpg –decrypt yourfriendsfile.txt.gpg > yourfriendsfile.txt

Encrypt Files

gpg --encrypt --r public_keyname_of_recipientyourfile.txt

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