作业，

作业，

1.查看java命令来自哪个安装包

[root@centos7 ~]#whereis java  ⇐ 第二段的二进制文件路径
java: /usr/bin/java /usr/lib/java /etc/java /usr/share/java /usr/share/man/man1/java.1.gz
[root@centos7 ~]#rpm -qf /usr/lib/java
javapackages-tools-3.4.1-11.el7.noarch
[root@centos7 ~]#rpm -q javapackages-tools3.4.1-11.e17.n
package javapackages-tools3.4.1-11.e17.n is not installed  ⇐ 这就是java命令的包

[root@centos7 ~]#yum provides java
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
1:java-1.7.0-openjdk-1.7.0.171-2.6.13.2.el7.x86_64 : OpenJDK Runtime Environment
Repo        : base
Matched from:
Provides    : java = 1:1.7.0



1:java-1.8.0-openjdk-1.8.0.161-2.b14.el7.i686 : OpenJDK Runtime Environment
Repo        : base
Matched from:
Provides    : java = 1:1.8.0



1:java-1.8.0-openjdk-1.8.0.161-2.b14.el7.x86_64 : OpenJDK Runtime Environment
Repo        : base
Matched from:
Provides    : java = 1:1.8.0



1:java-1.7.0-openjdk-1.7.0.171-2.6.13.2.el7.x86_64 : OpenJDK Runtime Environment
Repo        : @anaconda
Matched from:
Provides    : java = 1:1.7.0



1:java-1.8.0-openjdk-1.8.0.161-2.b14.el7.x86_64 : OpenJDK Runtime Environment
Repo        : @anaconda
Matched from:
Provides    : java = 1:1.8.0

2.yum的配置和使用创建yum仓库

centos7 yum 安装autofs

[root@localhost yum]# yum install -y autofs先yum安装autofs    -y自动yes

安装后启动autofs

[root@localhost ~]# systemctl enable autofs   启动
Created symlink from /etc/systemd/system/multi-user.target.wants/autofs.service to /usr/lib/systemd/system/autofs.service.

[root@localhost ~]# systemctl start autofs 开机自启

接下来进入这个神奇目录即可自动挂载光盘

[root@localhost ~]# cd /misc/
[root@localhost misc]# cd cd

配置yum

****确保主机能连外网；

yum出错两点 ：
1 配置文件写错格式错 路径错
2 清除缓存 更换路径后缓存文件不变 要清空

架设本地文件源

[root@localhost ~]# cd /etc/yum/ 把自带的.repo后缀的文件mv移走 用不到那些源
 
[root@centos7 ~]#vim /etc/yum.repos.d/base.repo ⇐ 创建一个源 后缀必须是.repo
[base]
name=cdrom.repo               ⇐ 名字
baseurl=file:///misc/cd/       ⇐ 源路径                                                                                
gpgcheck=0                          ⇐ 不检查key
gpgkey=file:///misc/cd/RPM-GPG-KEY-CentOS-7  ⇐ 钥匙key的路径

[epel]                                ⇐ epel网络源名称
name=epel
baseurl=https://mirrors.tuna.tsinghua.edu.cn/epel/$releasever/$basearch  ⇐ 清华和阿里epel源路径 变量识别配置，不用写6版本 还是7版本 架构处理器都自动识别
gpgcheck=0
~                                                                                                              
~                                      

配置完成后就可以使用了：

[root@localhost ~]# yum repolist
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
repo id                                            repo name                                             status
!base                                              cdrom repo                                            9,911
repolist: 9,911 ⇐ 配置的本地源数量

[root@centos7 ~]#yum install  system-config-kickstart  安装system-config-kickstart进去后 自动列 出相关的安装包 敲y自动安装 -y更自动

查看库里安装包的信息

[root@centos7 ~]#yum info system-config-kickstart
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Available Packages
Name        : system-config-kickstart
Arch        : noarch
Version     : 2.9.7
Release     : 1.el7
Size        : 348 k
Repo        : base
Summary     : A graphical interface for making kickstart files
URL         : http://fedoraproject.org/wiki/SystemConfig/Tools
License     : GPLv2+
Description : Kickstart Configurator is a graphical tool for creating kickstart files.

配置key

[root@centos7 Packages]#rpm -K zziplib-devel-0.13.62-5.el7.x86_64.rpm    ⇐ 检查该包的key

没有密钥key执行：

[root@centos7 Packages]#rpm --import /misc/cd/RPM-GPG-KEY-CentOS-7

导入密钥后 -k可以查包的密钥是否ok

[root@centos7 Packages]#rpm -qa "gpg-pubkey"  ⇐ 这是刚才导入的密钥信息
gpg-pubkey-f4a80eb5-53a7ff4b

通过qi查看当前密钥的具体信息

[root@centos7 Packages]#rpm -qi "gpg-pubkey"  ⇐ 跟上个cat 查看到的一样

[root@centos7 ~]#vim /data/bin/reset.sh

#!/bin/bash
#
#********************************************************************
#Author:                caixiaomie
#QQ:                    1273281238
#Date:                  2018-10-20
#FileName：             /data/bin/reset.sh
#URL:                   http://www.caixiaoyang.com
#Description：          The test script
#Copyright (C):         2018 All rights reserved in/bash: No such file or directory
cat << EOF >> ~/.bashrc                                                                                        
alias ifconfig='ifconfig ens33'
PS1='\[\e[32;40m\][\u@\h \W]\$ '
EOF

cat >> /etc/yum.repos.d/base.repo <<EOF
[base]
name=cdrom.repo
baseurl=file:///misc/cd/                                                                                       
gpgcheck=0
gpgkey=file:///misc/cd/RPM-GPG-KEY-CentOS-7
EOF

yum install -y tree ftp lftp telnet



~           

    在这里插入代码片