Question

我刚刚在我的电脑上安装了CentOS 7。安装完成后，我尝试使用yum update命令更新CentOS：

Downloading packages:
No Presto metadata available for base
warning: /var/cache/yum/x86_64/7/base/packages/dhclient-4.2.5-36.el7.centos.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Public key for dhclient-4.2.5-36.el7.centos.x86_64.rpm is not installed
(1/320): dhclient-4.2.5-36.el7.centos.x86_64.rpm           | 278 kB   00:03     
(2/320): dhcp-common-4.2.5-36.el7.centos.x86_64.rpm        | 171 kB   00:04     
(3/320): dmraid-events-1.0.0.rc16-25.el7.x86_64.rpm        |  21 kB   00:01     
(4/320): dmraid-1.0.0.rc16-25.el7.x86_64.rpm               | 150 kB   00:02     
(5/320): dhcp-libs-4.2.5-36.el7.centos.x86_64.rpm          | 127 kB   00:02     
Traceback (most recent call last):              ] 508 kB/s | 5.3 MB   09:41 ETA 
  File "/usr/libexec/urlgrabber-ext-down", line 75, in <module>
    main()
  File "/usr/libexec/urlgrabber-ext-down", line 61, in main
    fo = PyCurlFileObject(opts.url, opts.filename, opts)
  File "/usr/lib/python2.7/site-packages/urlgrabber/grabber.py", line 1258, in __init__
    self._do_open()
  File "/usr/lib/python2.7/site-packages/urlgrabber/grabber.py", line 1589, in _do_open
    self._do_grab()
  File "/usr/lib/python2.7/site-packages/urlgrabber/grabber.py", line 1723, in _do_grab
    self._do_perform()
  File "/usr/lib/python2.7/site-packages/urlgrabber/grabber.py", line 1517, in _do_perform
    raise KeyboardInterrupt
KeyboardInterrupt

显示此错误：

No Presto metadata available for base

为什么会出现此错误？

Answer 1

此问题是由于urlgrabber python脚本中的错误引起的：要缓解此问题，您可以编辑/usr/lib/python2.7/site-packages/urlgrabber/grabber.py中的第1510行

然后更换行号1510：

elif errcode in (42, 55, 56):

用这个：

elif errcode == 42:

我最近遇到了这个问题，并在CentOS论坛中找到了这个解决方案，您可以在其中详细了解该问题：https://www.centos.org/forums/viewtopic.php?f=47&t=47372&start=10

Centos 7.0更新命令无法正常工作

1 个答案: