1、自建yum仓库，分别为网络源和本地源
1）基于本地光盘创建yum源
#将本地光盘挂载到/misc/cd目录
[04:55:18 root@base ~]#yum -y install autofs
[04:56:26 root@base ~]#systemctl start autofs
[04:56:33 root@base ~]#systemctl enable autofs
[04:57:02 root@base ~]#cd /misc/cd
[04:57:43 root@base cd]#ls
CentOS_BuildTag EULA images LiveOS repodata RPM-GPG-KEY-CentOS-Testing-7
EFI GPL isolinux Packages RPM-GPG-KEY-CentOS-7 TRANS.TBL
[04:58:11 root@base cd]#df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 17G 1.4G 16G 9% /
devtmpfs 476M 0 476M 0% /dev
tmpfs 488M 0 488M 0% /dev/shm
tmpfs 488M 7.6M 480M 2% /run
tmpfs 488M 0 488M 0% /sys/fs/cgroup
/dev/sda1 1014M 130M 885M 13% /boot
tmpfs 98M 0 98M 0% /run/user/0
/dev/sr0 8.8G 8.8G 0 100% /misc/cd
#创建本地光盘源的repo文件
[05:23:46 root@base cd]#cat /etc/yum.repos.d/loacl.repo
[local_base]
name=local_base
baseurl=file:///misc/cd
enable=1
gpgcheck=0
#查看yum源的仓库列表，可以看到手动创建的本地光盘源生效
[05:23:34 root@base cd]#yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
local_base | 3.6 kB 00:00:00
(1/2): local_base/group_gz | 166 kB 00:00:00
(2/2): local_base/primary_db | 5.9 MB 00:00:00
repo id repo name status
base/7/x86_64 CentOS-7 - Base - mirrors.aliyun.com 10,072
epel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 13,504
extras/7/x86_64 CentOS-7 - Extras - mirrors.aliyun.com 448
local_base local_base 9,911
updates/7/x86_64 CentOS-7 - Updates - mirrors.aliyun.com 1,155
repolist: 35,090
2）基于本地的网络yum源（web服务httpd）
注：centos8充当服务端，base充当客户端
服务器端配置:
[03:39:07 root@centos8 ~]#yum -y install httpd
[03:39:07 root@centos8 ~]# systemctl start httpd
[03:39:07 root@centos8 ~]#ss -nultp | grep :80
[03:39:07 root@centos8 ~]#cp -av /misc/cd/AppStream/ /misc/cd/BaseOS/ /var/www/html/data/
[03:39:07 root@centos8 ~]#cd /var/www/html/data/
[03:39:07 root@centos8 data]#createrepo .
[03:43:15 root@centos8 data]#ls
AppStream BaseOS repodata
客户端配置：
[06:37:41 root@base ~]#cat /etc/yum.repos.d/http.repo
[http_base]
name=http_base
baseurl=http://192.168.10.30/data
enable=1
gpgcheck=0
[06:44:34 root@base ~]#yum repolist
\Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
repo id repo name status
base/7/x86_64 CentOS-7 - Base - mirrors.aliyun.com 10,072
epel/x86_64 Extra Packages for Enterprise Linux 7 - x86_64 13,504
extras/7/x86_64 CentOS-7 - Extras - mirrors.aliyun.com 448
http_base http_base 6,774
updates/7/x86_64 CentOS-7 - Updates - mirrors.aliyun.com 1,155
repolist: 31,953
2、编译安装http2.4，实现可以正常访问，并将编译步骤和结果提交。
#编译安装httpd软件
[10:38:53 root@base ]#mv /root/httpd-2.4.46.tar.gz /usr/local/src
[10:38:53 root@base src]#tar -xf httpd-2.4.46.tar.gz
[10:38:53 root@base httpd-2.4.46]#yum -y install gcc make
#执行 ./configure生成makefile文件时报错，缺少以下包安装即可
[10:38:53 root@base httpd-2.4.46]#./configure
[10:38:53 root@base httpd-2.4.46]#yum -y isntall apr-devel.x86_64
[10:38:53 root@base httpd-2.4.46]#yum -y install apr-util-devel.x86_64
[10:38:53 root@base httpd-2.4.46]#yum -y install pcre-devel-8.32-17.el7.x86_64
[10:38:53 root@base httpd-2.4.46]#./configure
[10:38:53 root@base httpd-2.4.46]#make && make install
#启动httpd服务：
[10:49:15 root@base apache2]#./bin/apachectl
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using fe80::20c:29ff:fe08:cc83. Set the 'ServerName' directive globally to suppress this message
#查看服务端口：
[11:26:35 root@base apache2]#ss -nltp | grep :80
LISTEN 0 128 :::80 :::* users:(("httpd",pid=20144,fd=4),("httpd",pid=20062,fd=4),("httpd",pid=20061,fd=4),("httpd",pid=20060,fd=4),("httpd",pid=20058,fd=4))
启动Apache服务可以看到下面的初始界面
1609605196(1).jpg
3、利用sed 取出ifconfig命令中本机的IPv4地址
[20:24:10 root@base ~]#ifconfig ens32 | sed -nr '2s/(.*inet )([0-9].*)( netmask.*)/\2/p'
192.168.10.21
[20:31:44 root@base ~]#ifconfig ens32 | sed -nr '2s/[^0-9]+([0-9.]+).*/\1/p'
192.168.10.21
[20:33:17 root@base ~]#ifconfig ens32 | sed -nr '2s/^[^0-9]+([0-9.]+) .*$/\1/p'
192.168.10.21
4、删除/etc/fstab文件中所有以#开头，后面至少跟一个空白字符的行的行首的#和空白字符
[20:44:12 root@base ~]#cat /data/fstab
#
# /etc/fstab
# Created by anaconda on Fri Sep 18 09:14:37 2020
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos-root / xfs defaults 0 0
UUID=4a4824a6-7cbd-4f25-9579-b51cce5b937c /boot xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0
[20:44:07 root@base ~]#sed -nr 's/^[^#](.*)/\1/p' /data/fstab
dev/mapper/centos-root / xfs defaults 0 0
UID=4a4824a6-7cbd-4f25-9579-b51cce5b937c /boot xfs defaults 0 0
dev/mapper/centos-swap swap swap defaults 0 0
5、处理/etc/fstab路径,使用sed命令取出其目录名和基名
#取基名：
[20:52:29 root@base ~]#echo /etc/fstab | sed -nr 's/(^\/.*\/)([^/]+\/?)/\2/p'
fstab
#取目录名
[20:52:34 root@base ~]#echo /etc/fstab | sed -nr 's/(^\/.*\/)([^/]+\/?)/\1/p'
/etc/
命令取基名、目录名
[20:53:05 root@base ~]#basename /etc/fstab
fstab
[20:55:47 root@base ~]#dirname /etc/fstab
/etc
