个人服务器

1、用yum install 安装太方便了，不用考虑依赖

yum install java     yum install mysql    yum install tomcat  一下子就搞定了。

安装好mysql好像并不能启动，还要yum install mariadb-server -y

具体看：https://blog.csdn.net/lixingdefengzi/article/details/50887162

find / -name tomcat  找目录。

2020-09-12

今天想用yum安装东西，失败了。

[root@izwz9eo2whsnfgi4ccyqouz yum.repos.d]# yum install lrzsz
Loaded plugins: fastestmirror
http://mirrors.aliyun.com/epel/5/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found
Trying other mirror.
To address this issue please refer to the below wiki article 

https://wiki.centos.org/yum-errors

If above article doesn't help to resolve this issue please use https://bugs.centos.org/.



 One of the configured repositories failed (Extra Packages for Enterprise Linux 5 - x86_64),
 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. Run the command with the repository temporarily disabled
            yum --disablerepo=epel ...

     4. Disable the repository permanently, 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 epel
        or
            subscription-manager repos --disable=epel

     5. 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=epel.skip_if_unavailable=true

failure: repodata/repomd.xml from epel: [Errno 256] No more mirrors to try.
http://mirrors.aliyun.com/epel/5/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404 - Not Found

 cd /etc/yum.repos.d

mv epel.repo epel.repo.bok

把epel.repo设为无效，再试就可以了，如果还有其它文件是这样，也是同样的改名为bak，就能安装了。