# 三丰云”免费虚拟主机免费云服务器yum出错

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One of the configured repositories failed (未知),
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


Cannot retrieve metalink for repository: epel/x86_64. Please verify its path and try again

PostgreSQL 10.1 手册_部分 III. 服务器管理_第 28 章 监控数据库活动_28.1. 标准 Unix 工具
28.1. 标准 Unix 工具 在大部分 Unix 平台上，PostgreSQL会修改由ps报告的命令标题，这样个体服务器进程可以被标识。一个显示样例是 \$ ps auxww | grep ^postgres postgres 15551 0.
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企业目前对于IT预算的投入处于停滞状态。企业对于IT人才的招聘也跟不上新技术的需求。正是迫于这些趋势的影响，使得企业当下的IT人员们被不断的要求以更少的资金完成更多的工作任务。 　　企业IT预算开支的持平与企业IT人员配置的减少所带来的不可避免的后果便是：涉及传统应用程序的项目的优先级被降低。
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