Red Hat NETWORK SATELLITE 5.1.0 - CHANNEL MANAGEMENT Manual de usuario descargar pdf (Pagina 16)

2.1. Generating a GnuPG Keypair

A GnuPG keypair consists of the private and public keys. To generate a keypair type the

following command as the root user on the shell prompt:

gpg --gen-key

If you execute this command as a non-root user, you see the following message:

gpg: Warning: using insecure memory!

This message appears because non-root users cannot lock memory pages. Since you do not

want anyone else to have your private GnuPG key or your passphrase, you want to generate

the keypair as root. The root user can lock memory pages, which means the information is

never written to disk.

After executing the command to generate a keypair, you see an introductory screen containing

key options similar to the following:

program comes with ABSOLUTELY NO WARRANTY. This is free software, and you

are welcome to redistribute it under certain conditions. See the file

COPYING for details. Please select what kind of key you want: (1) DSA and

ElGamal (default) (2) DSA (sign only) (4) RSA (sign only) Your selection?

Accept the default option: (1) DSA and ElGamal. This option allows you to create a digital

signature and encrypt/decrypt with two types of technologies. Type 1 and then press Enter.

Next, choose the key size, which is how long the key should be. The longer the key, the more

resistant against attacks your messages are. Creating a key of at least 1024 bits in size is

recommended.

The next option asks you to specify how long you want your key to be valid. If you do choose an

expiration date, remember that anyone who is using your public key must also be informed of its

expiration and supplied with a new public key. It is recommended that you select no expiration

date. If you do not choose an expiration date, you are asked to confirm your decision:

Key does not expire at all Is this correct (y/n)?

Press y to confirm your decision.

Your next task is to provide a User-ID containing your name, your email address, and an

optional comment. Each is requested individually. When you are finished, you are presented

with a summary of the information you entered.

Once you accept your choices, you enter a passphrase.

Chapter 3. Building Custom Packages

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Red Hat NETWORK SATELLITE 5.1.0 - CHANNEL MANAGEMENT Manual de usuario Pagina 16