總結CentOS yum 錯誤分析解決

一、今天技安在yum自己的小雲主機的時候，出現了一下錯誤：

$ yum -y update
rpmdb: Thread/process 28636/139844750771968 failed: Thread died in Berkeley DB library
error: db3 error(-30974) from dbenv->failchk: DB_RUNRECOVERY: Fatal error, run database recovery
error: cannot open Packages index using db3 - (-30974)
error: cannot open Packages database in /var/lib/rpm
CRITICAL:yum.main:
Error: rpmdb open failed

大致的意思是rpmdb開啟失敗。於是google了一下

解決辦法：

# 清除緩衝
rm /var/lib/rpm/__db*
# 重建
rpm --rebuilddb
之後就可以正常的update了。

二、在centOs上安裝軟體時。提示報錯資訊：

Could not retrieve mirrorlisthttp://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os error was

14: PYCURL ERROR 6 - "Couldn't resolvehost 'mirrorlist.centos.org'"

Could not retrieve mirrorlisthttp://mirrorlist.centos.org/?release=6&arch=x86_64&repo=extras errorwas

14: PYCURL ERROR 6 - "Couldn't resolvehost 'mirrorlist.centos.org'"

Could not retrieve mirrorlisthttp://mirrorlist.centos.org/?release=6&arch=x86_64&repo=updates errorwas

14: PYCURL ERROR 6 - "Couldn't resolvehost 'mirrorlist.centos.org'"

http://mirrors.163.com/centos/6.2/os/x86_64/repodata/repomd.xml:[Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'mirrors.163.com'"

Trying other mirror.

Error: Cannot retrieve repository metadata(repomd.xml) for repository: base. Please verify its path and try again

[root@hbase01-222 ~]# service iptables stop

[root@hbase01-222 ~]# nslookup  mirrorlist.centos.org

;; connection timed out; no servers couldbe reached

到這裡發現問題了，我的網域名稱解析不了，yum的設定檔裡指向的網域名稱就識別不了了。重新設定下dns指向。

[root@hbase01-222 ~]# vim /etc/resolv.conf

# Generated by NetworkManager

 

nameserver 8.8.8.8

[root@hbase01-222 ~]# yum install gcc-c++

解決Centos yum 更新出錯

顯示錯誤如下：

Loaded plugins: fastestmirror, langpacks

1、dns問題

2、鏡像串連錯誤

 

DNS問題

先說dns問題，測試方法就是ping外網，發現ping不通就是這個問題。

解決方案：

echo "nameserver 8.8.8.8">>/etc/resolv.conf

 

鏡像串連錯誤

如果是第二個問題，就考慮使用國內的鏡像，比如163鏡像。

解決方案：

這裡以centos 7為例，其他版本把數字改下就好，取大版本號碼

cd /etc/yum.repos.d

mv CentOS-Base.repo CentOS-Base.repo.bak

vi CentOS-Base.repo

[base]
name=Red Hat Enterprise Linux 7.0 -Base
baseurl=http://mirrors.163.com/centos/7/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
[update]
name=Red Hat Enterprise Linux 7.0 -Updates
baseurl=http://mirrors.163.com/centos/7/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
[extras]
name=Red Hat Enterprise Linux 7.0 -Extras
baseurl=http://mirrors.163.com/centos/7/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
儲存即可。