The --keyserver option must be followed by the name of the key server you wish to search. The --search-keys option must be followed by either the name of the person you are searching for or their email address.
Matches are listed for you and numbered. To import one, type the number and press Enter. In this case, there is a single match, so we type 1 and press Enter.
If you have been handed a public key file by someone known to you, you can safely say it belongs to that person. The --fingerprint option causes gpg to create a short sequence of ten sets of four hexadecimal characters. You can ask the person to send you the fingerprint of their key. You can then use the --fingerprint option to generate the same fingerprint sequence of hexadecimal characters and compare them. If they match, you know that the key belongs to that person.
But gpg will ask you every time whether you wish to proceed because the key is unsigned. Press Y and hit Enter to sign the key. To share your key as a file, we need to export it from the gpg local key store.
The --output option must be followed by the name fo the file you wish to have the key exported into. You can also share your public key on a public key server. The --send-keys option sends the key to the keyserver.
The --keyserver option must be followed by the web address of the public key server. To identify which key to send, the fingerprint for the key must be provided on the command line. Note there are no spaces between the sets of four characters. The --encrypt option tells gpg to encrypt the file, and the --sign option tells it to sign the file with your details. The only person to have both of those should be Mary. Mary has sent a reply. It is in an encrypted file called coded.
We can decrypt it very easily using the --decrypt option. We are going to redirect the output into another file called plain. It can work that out from the encrypted contents of the file. Periodically, you can ask gpg to check the keys it has against a public key server and to refresh any that have changed.
You might do this every few months or when you receive a key from a new contact. The --refresh-keys option causes gpg to perform the check. The --keyserver option must be followed by the key server of your choice. Privacy is never far from the news these days. Whatever your reasons for wanting to keep your information secure and private, gpg provides a simple means to apply incredibly strong encryption to your files and communications. There are other ways to use gpg. You can get a plugin for Thunderbird called Enigmail.
It hooks right into your gpg configuration to allow you encrypt email messages from inside Thunderbird. Use Google Fonts in Word. Use FaceTime on Android Signal vs. Customize the Taskbar in Windows What Is svchost. Best Smartwatches. Best Gaming Laptops. Best Smart Displays. Best Home Security Systems. Best External Solid State Drives. Best Portable Chargers. Best Phone Chargers. Best Wi-Fi Range Extenders.
Best Oculus Quest 2 Accessories. Best iPad Air Cases. I also found some documentation suggesting the use of --multifile for situations like this, so that the passphrase has to only be entered once. Incidentally, I like your leaf beetle avatar! It's a dogbane leaf beetle if you're interested!
As it is said in the manual you need to add --batch option: --passphrase-fd n Read the passphrase from file descriptor n. Only the first line will be read from file descriptor n. This can only be used if only one passphrase is supplied. Note that this passphrase is only used if the option --batch has also been given. This is different from gpg. Don't use this option if you can avoid it.
You can have either of these two forms: echo "passphrase" gpg --passphrase-fd 0 --batch -d --output "decrypted. Not sure it's great to have the passphrase in the command line like this as then it becomes visible to all users on the system using ps and similar tools — BenKennish.
Community Bot 1 1 1 silver badge. Gabe Kopley Gabe Kopley Harika Boggavarapu Harika Boggavarapu 1. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. You will likely want to pass the passphrase with one of the following gpg options the latter would be most secure choice :.
If you want to try something else then GPG there are other backup methods for encrypting multiple files:. Ran a Bash script asking gpg2 to read each file name in a loop and into a memory variable, and in the same loop to encrypt it using my signing key and specifying that it was for reading by myself. Bad practice, but not so bad if you are then not on the Net, and you power-down immediately after your encrypting session.
So sat with my finger on the Y key and encrypted 51 nos files in less than a minute. You can download for free at www. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Learn more. Encrypt multiple files at once Ask Question. Asked 9 years, 5 months ago. Active 8 months ago. Viewed 25k times. I see the following error in the shell: usage: gpg [options] --symmetric [filename] Is there a way to do what I'm looking to accomplish? Improve this question. Naftuli Kay Naftuli Kay
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