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GnuPG 安裝

  1. 以 yum 安裝。
    [root@kvm8 ~]# yum install gnupg2
    Loaded plugins: fastestmirror
    Loading mirror speeds from cached hostfile
    dywang                                                   | 1.9 kB     00:00     
    Setting up Install Process
    Package gnupg2-2.0.14-4.el6.x86_64 already installed and latest version
    Nothing to do
    
  2. --help 選項列出輔助說明。
    [root@kvm8 ~]# gpg --help
    gpg (GnuPG) 2.0.14
    libgcrypt 1.4.5
    Copyright (C) 2009 Free Software Foundation, Inc.
    License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
    This is free software: you are free to change and redistribute it.
    There is NO WARRANTY, to the extent permitted by law.
    
    Home: ~/.gnupg
    Supported algorithms:
    Pubkey: RSA, ELG, DSA
    Cipher: 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH, CAMELLIA128, 
            CAMELLIA192, CAMELLIA256
    Hash: MD5, SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
    Compression: Uncompressed, ZIP, ZLIB, BZIP2
    
    Syntax: gpg [options] [files]
    sign, check, encrypt or decrypt
    default operation depends on the input data
    
    Commands:
     
     -s, --sign                 make a signature
         --clearsign            make a clear text signature
     -b, --detach-sign          make a detached signature
     -e, --encrypt              encrypt data
     -c, --symmetric            encryption only with symmetric cipher
     -d, --decrypt              decrypt data (default)
         --verify               verify a signature
     -k, --list-keys            list keys
         --list-sigs            list keys and signatures
         --check-sigs           list and check key signatures
         --fingerprint          list keys and fingerprints
     -K, --list-secret-keys     list secret keys
         --gen-key              generate a new key pair
         --delete-keys          remove keys from the public keyring
         --delete-secret-keys   remove keys from the secret keyring
         --sign-key             sign a key
         --lsign-key            sign a key locally
         --edit-key             sign or edit a key
         --gen-revoke           generate a revocation certificate
         --export               export keys
         --send-keys            export keys to a key server
         --recv-keys            import keys from a key server
         --search-keys          search for keys on a key server
         --refresh-keys         update all keys from a keyserver
         --import               import/merge keys
         --card-status          print the card status
         --card-edit            change data on a card
         --change-pin           change a card's PIN
         --update-trustdb       update the trust database
         --print-md             print message digests
         --server               run in server mode
    
    Options:
     
     -a, --armor                create ascii armored output
     -r, --recipient USER-ID    encrypt for USER-ID
     -u, --local-user USER-ID   use USER-ID to sign or decrypt
     -z N                       set compress level to N (0 disables)
         --textmode             use canonical text mode
     -o, --output FILE          write output to FILE
     -v, --verbose              verbose
     -n, --dry-run              do not make any changes
     -i, --interactive          prompt before overwriting
         --openpgp              use strict OpenPGP behavior
    
    (See the man page for a complete listing of all commands and options)
    
    Examples:
    
     -se -r Bob [file]          sign and encrypt for user Bob
     --clearsign [file]         make a clear text signature
     --detach-sign [file]       make a detached signature
     --list-keys [names]        show keys
     --fingerprint [names]      show fingerprints
    
    Please report bugs to <http://bugs.gnupg.org>.
    
  3. 以 yum 安裝 rng-tools。
    [root@kvm8 ~]# yum install rng-tools
    
  4. Kernel device used for random number input (default: /dev/hwrandom)
    [root@kvm8 ~]# rngd -r /dev/urandom
    



De-Yu Wang 2018-08-08