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CentOS7 无法使用yum命令，无法更新解决方法

發(fā)布時間：2024/1/18 编程问答 22 豆豆

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前言
設(shè)置網(wǎng)卡開機(jī)自動啟動
設(shè)置國內(nèi)dns服務(wù)器系統(tǒng)
修改CentOS-Base.repo中的地址
所參考的文章地址

前言

剛安裝完的CentOS7的系統(tǒng)，發(fā)現(xiàn)無法使用yum命令進(jìn)行更新，在更新的時候會出現(xiàn)下面這種內(nèi)容，為此問題有以下這些解決方案可以嘗試。

One of the configured repositories failed (Unknown),and yum doesn't have enough cached data to continue. At this point the onlysafe thing yum can do is fail. There are a few ways to work "fix" this:1. Contact the upstream for the repository and get them to fix the problem.2. Reconfigure the baseurl/etc. for the repository, to point to a workingupstream. This is most often useful if you are using a newerdistribution release than is supported by the repository (and thepackages for the previous distribution release still work).3. Disable the repository, so yum won't use it by default. Yum will thenjust ignore the repository until you permanently enable it again or use--enablerepo for temporary usage:yum-config-manager --disable <repoid>4. Configure the failing repository to be skipped, if it is unavailable.Note that yum will try to contact the repo. when it runs most commands,so will have to try and fail each time (and thus. yum will be be muchslower). If it is a very temporary problem though, this is often a nicecompromise:yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

One of the configured repositories failed (Unknown),

and yum doesn't have enough cached data to continue. At this point the only

safe thing yum can do is fail. There are a few ways to work "fix" this:

? ? 1. Contact the upstream for the repository and get them to fix the problem.

? ? 2. Reconfigure the baseurl/etc. for the repository, to point to a working

? ? ? upstream. This is most often useful if you are using a newer

? ? ? distribution release than is supported by the repository (and the

? ? ? packages for the previous distribution release still work).

? ? 3. Disable the repository, so yum won't use it by default. Yum will then

? ? ? just ignore the repository until you permanently enable it again or use

? ? ? ?--enablerepo for temporary usage:

? ? ? ? ? yum-config-manager --disable <repoid>

? ? 4. Configure the failing repository to be skipped, if it is unavailable.

? ? ? Note that yum will try to contact the repo. when it runs most commands,

? ? ? so will have to try and fail each time (and thus. yum will be be much

? ? ? slower). If it is a very temporary problem though, this is often a nice

? ? ? compromise:

? ? ? ? ? yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true

設(shè)置網(wǎng)卡開機(jī)自動啟動

針對這個問題首先要確認(rèn)網(wǎng)卡是否已經(jīng)啟動了，CentOS7最開始安裝完的時候網(wǎng)卡可能會是關(guān)閉的，需要自己自行開啟。

確保自己使用的是root賬號，若不是，請自行更換。

1、進(jìn)入/etc/sysconfig/network-scripts 目錄。即輸入命令 "cd /etc/sysconfig/network-scripts" ，使用命令 "ls -a" 可以查看該目錄下的所有文件。

2、修改ifcfg-ens33的網(wǎng)卡配置文件（CentOS7修改了網(wǎng)卡命名規(guī)則，不再是eth0了，而是ifcfg-eno+數(shù)字）。輸入命令 "vi ifcfg-ens33" 進(jìn)入vi編輯器，按下"i"或者"insert"鍵進(jìn)入編輯模式。

3、將 "ONBOOT" 的值修改為 "yes" ，之后按esc退出編輯模式，輸入 ":wq" 保存退出

4、重啟系統(tǒng)或者重啟網(wǎng)卡，輸入命令 "reboot" 或 "service network restart"。

設(shè)置國內(nèi)dns服務(wù)器

若已經(jīng)開啟了網(wǎng)卡還是存在該問題可以嘗試配置下國內(nèi)的dns。

1、輸入命令 "vi /etc/resolv.conf"?

2、添加 "nameserver 114.114.114.114"?

3、保存后，重啟系統(tǒng)或者重啟網(wǎng)卡，輸入命令 "reboot" 或 "service network restart"。

修改CentOS-Base.repo中的地址

若上述方法還是無效可以嘗試修改CentOS-Base.repo中的地址

1、進(jìn)入 "/etc/yum.repos.d" 。

2、編輯 "vi CentOS-Base.repo" 。

3、將所有的 "mirrorlist" 注釋掉，將所有的 "baseurl" 取消注釋。

4、保存后，重啟系統(tǒng)，輸入命令 "reboot" 。

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