六、仓库跟sed

1、自建yum仓库，分别为网络源和本地源

[root@repo-client ~]#vim /etc/yum.repos.d/CentOS-Base.repo

[BaseOS]
name=BaseOS
baseurl=file:///misc/cd/     
        https://mirrors.aliyun.com/centos/$releasever/os/$basearch
gpgcheck=0

[epel]
name=epel
baseurl=https://mirrors.aliyun.com/epel/$releasever/$basearch
gpgcheck=1
pgpkey=https://mirrors.aliyun.com/epel/RPM-GPG-KEY-EPEL-7

[extras]
name=extras
baseurl=https://mirrors.aliyun.com/centos/$releasever/extras/$basearch
pgpcheck=0

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。

#安装前准备：关闭防火墙和SELinux
#1 安装包
[root@centos8 ~]#dnf install gcc make apr-devel apr-util-devel pcre-devel openssl-devel redhat-rpm-config bzip2  lsof 

#进入想要安装包的路径
[root@centos8 src]cd /usr/local/src
#下载安装包
[root@centos8 src]#wget https://mirrors.bfsu.edu.cn/apache//httpd/httpd-2.4.46.tar.bz2

#2 下载并解压缩包，-C指定安装路径
[root@centos8 ~]#tar xvf httpd-2.4.43.tar.bz2 -C /usr/local/src

#3 配置
[root@centos8 ~]#cd /usr/local/src/httpd-2.4.43/
[root@centos8 httpd-2.4.43]#./configure --prefix=/apps/httpd24 --sysconfdir=/etc/httpd24 --enable-ssl

#4 编译并安装
[root@centos8 httpd-2.4.43]#make -j 4 && make install

#5 配置环境
[root@centos8 ~]#echo 'PATH=/apps/httpd24/bin:$PATH' > /etc/profile.d/httpd24.sh
[root@centos8 ~]#. /etc/profile.d/httpd24.sh

#6运行
[root@centos8 ~]#apachectl
#如果出现端口被占用情况，找出占用端口的进程杀死
[root@Centos7 httpd-2.4.46]# lsof -i :80
[root@Centos7 httpd-2.4.46]# kill  -9 1304


#7 指定用apache用户运行
[root@centos8 ~]#useradd -r -s /sbin/nologin -d /var/www -c Apache -u 48 apache
[root@centos8 ~]#vim /etc/httpd24/httpd.conf
user apache
group apache

#8生效和验证
[root@centos8 ~]#apachectl restart
#查看
[root@centos8 ~]#ps aux

验证结果：

图片.png

3、利用sed 取出ifconfig命令中本机的IPv4地址

[root@Centos7 ~]# ifconfig | sed -nr '2s/(.*inet )([0-9].*)( netmask.*)/\2/p'
10.154.119.140

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

[root@Centos7 ~]# sed -n '/^#/s/^#//!p' /etc/fstab

UUID=3089f417-1bba-4347-8f21-a4581fce760a /                       xfs     defaults        0 0
UUID=71afae2d-2416-4c68-8375-e27437e32fa3 /boot                   xfs     defaults        0 0
UUID=bb537f14-b824-402e-81c3-63b87a82052a /data                   xfs     defaults        0 0
UUID=bb38c0b6-b4b3-41b8-96f9-30af2315226c 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

#取目录名
[root@Centos7 ~]# echo /etc/fstab |sed -r 's#(^/.*/)([^/]+/?)#\1#'
/etc/

#取基名
[root@Centos7 ~]# echo /etc/fstab |sed -r 's#(^/.*/)([^/]+/?)#\2#'
fstab