GPG签名创建问题

Question

各位前辈好！
小弟，昨天在新建GPG签名时遇到一个小小的问题：
gpg (GnuPG) 1.2.1; Copyright (C) 2002 Free Software Foundation, Inc.
This 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.

gpg: /root/.gnupg: directory created
gpg: new configuration file `/root/.gnupg/gpg.conf' created
gpg: keyblock resource `/root/.gnupg/secring.gpg': file open error
gpg: keyring `/root/.gnupg/pubring.gpg' created
Please select what kind of key you want:
   (1) DSA and ElGamal (default)
   (2) DSA (sign only)
   (5) RSA (sign only)
Your selection? 1
DSA keypair will have 1024 bits.
About to generate a new ELG-E keypair.
              minimum keysize is  768 bits
              default keysize is 1024 bits
    highest suggested keysize is 2048 bits
What keysize do you want? (1024) 1024
Requested keysize is 1024 bits      
Please specify how long the key should be valid.
         0 = key does not expire
      <n>  = key expires in n days
      <n>w = key expires in n weeks
      <n>m = key expires in n months
      <n>y = key expires in n years
Key is valid for? (0) 0
Key does not expire at all
Is this correct (y/n)? y
                        
You need a User-ID to identify your key; the software constructs the user id
from Real Name, Comment and Email Address in this form:
    "Heinrich Heine (Der Dichter) <heinrichh@duesseldorf.de>"

Real name: supervisor
Email address: root@localhost
Comment: test               
You selected this USER-ID:
    "supervisor (test) <root@localhost>"

Change (N)ame, (C)omment, (E)mail or (O)kay/(Q)uit? o
You need a Passphrase to protect your secret key.   

We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
++++++++++.++++++++++.++++++++++.++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++.++++++++++++++++++++++++++++++>..++++++++++.............>+++++.+++++

Not enough random bytes available.  Please do some other work to give
the OS a chance to collect more entropy! (Need 300 more bytes)
We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
.++++++++++++++++++++...++++++++++++++++++++++++++++++++++++++++.+++++++++++++++++++++++++.++++++++++++++++++++.+++++++++++++++.++++++++++>.+++++>+++++..................<+++++...>+++++.<.+++++..>.+++++.....<+++++...........>+++++......<+++++........>+++++................+++++^^^
gpg: no writable secret keyring found: eof
Key generation failed: eof
不知道为什么，说我的没有结束标志呢？还是其他的问题？
谢谢大家！