Linux 527 重定向 2＞1 rsync定时同步（未完）

rsync定时同步

配环境

关闭防火墙、selinux

systemctl stop firewalld
systemctl disable firewalld
setenforce=0
vim /etc/SELINUX/config
SELINUX=disable

515

设置主机名

systemctl set-hostname code
systemctl set-hostname backup

配静态ip

rsync 需要稳定的路由表和端口

vim /etc/sysconfig/network-scripts/ifcfg-ens33IPADDR=192.168.235.XX
GATEWAY=192.168.235.XX
#NAT模式下，注意和虚拟机的一致;仅主机模式，据腾讯元宝，不需要网关也可以ping通
DNS1=8.8.8.8
BOOTPROTO=none

在这里插入图片描述

[caozx26@localhost ~]$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope host valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000link/ether 00:0c:29:57:94:60 brd ff:ff:ff:ff:ff:ff
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000link/ether 52:54:00:3d:30:2a brd ff:ff:ff:ff:ff:ffinet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000link/ether 52:54:00:3d:30:2a brd ff:ff:ff:ff:ff:ff
[caozx26@localhost ~]$ cd /etc/sysconfig/network-scripts/
[caozx26@localhost network-scripts]$ ls
ifcfg-ens33  ifdown-ppp       ifup-ib      ifup-Team
ifcfg-lo     ifdown-routes    ifup-ippp    ifup-TeamPort
ifdown       ifdown-sit       ifup-ipv6    ifup-tunnel
ifdown-bnep  ifdown-Team      ifup-isdn    ifup-wireless
ifdown-eth   ifdown-TeamPort  ifup-plip    init.ipv6-global
ifdown-ib    ifdown-tunnel    ifup-plusb   network-functions
ifdown-ippp  ifup             ifup-post    network-functions-ipv6
ifdown-ipv6  ifup-aliases     ifup-ppp
ifdown-isdn  ifup-bnep        ifup-routes
ifdown-post  ifup-eth         ifup-sit

virbr0 是什么？可以通过virbr0 的ip来Ping吗？可以修改virbr0吗？
在这里插入图片描述

a和a克隆虚拟机 virbr0都是1

[sudo] caozx26 的密码：
[root@localhost network-scripts]# echo 123 |passwd --stdin caozx26
更改用户 caozx26 的密码 。
passwd：所有的身份验证令牌已经成功更新。
#这里 | 的作用是什么  如何理解stdin

在这里插入图片描述
什么是标准输入，什么是标准输出什么是管道符标准输入、标准输出和管道符有什么关系和重定向符有什么关系
怎么理解输入流

在这里插入图片描述

怎样理解管道符|只传递stdout,不处理stderr;需结合2>&1重定向错误信息（之前编写intify.sh 用过2>&1？是的用在输出同步信息（包括时间）到rsync.log中），怎么理解&

&是重定向符号吗？怎么理解2>&1中的&? 重定向符>不是代表覆盖后面文件吗？sort < input.txt | uniq > output.txt 对文件内容排序去重的执行顺序是怎样的？在这里插入图片描述

重定向符>不是代表覆盖后面文件吗？为什么2>&1这里感觉不是覆盖是追加
计划明天再看

设置yum源

参考55

光盘那打勾

cd /etc/yum.repos.d
tar -zcf repo.tar.gz *.repo
rm -rf  *.repo
#1备份
#2挂载
rm -rf /mnt/*
mount -o ro /dev/sr0 /mnt
lsblk
chmod +x /etc/rc.local
#改开机自启文件为写权限
echo 'mount -o ro /dev/sr0 /mnt'>>/etc/rc.local
#把挂载操作写入到开机自启文件中 为啥用echo写入 不用cat? 这里>>的作用是什么？讲一下重定向
#3.编写local.repo
cd /etc/yum.repos.d
vim local.repo
[local]
name = local name 
baseurl=file:///mnt
gpgcheck=0
enable=1
#在编写文件时，什么时候需要注意等号前后的空格。
:wq
yum clean all
yum makecache

推测是追加写入>> ,>是覆盖后面

源码

仅主机1

[caozx26@localhost ~]$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope host valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000link/ether 00:0c:29:57:94:60 brd ff:ff:ff:ff:ff:ff
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000link/ether 52:54:00:3d:30:2a brd ff:ff:ff:ff:ff:ffinet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000link/ether 52:54:00:3d:30:2a brd ff:ff:ff:ff:ff:ff
[caozx26@localhost ~]$ cd /etc/sysconfig/network-scripts/
[caozx26@localhost network-scripts]$ ls
ifcfg-ens33  ifdown-ppp       ifup-ib      ifup-Team
ifcfg-lo     ifdown-routes    ifup-ippp    ifup-TeamPort
ifdown       ifdown-sit       ifup-ipv6    ifup-tunnel
ifdown-bnep  ifdown-Team      ifup-isdn    ifup-wireless
ifdown-eth   ifdown-TeamPort  ifup-plip    init.ipv6-global
ifdown-ib    ifdown-tunnel    ifup-plusb   network-functions
ifdown-ippp  ifup             ifup-post    network-functions-ipv6
ifdown-ipv6  ifup-aliases     ifup-ppp
ifdown-isdn  ifup-bnep        ifup-routes
ifdown-post  ifup-eth         ifup-sit
[caozx26@localhost network-scripts]$ cat ifcfg-ens33
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=dhcp
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33
UUID=87be7604-b172-4ef5-bd9c-769bc08dbd64
DEVICE=ens33
ONBOOT=no
[caozx26@localhost network-scripts]$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0
[caozx26@localhost network-scripts]$ echo 123 >>passwd --stdin caozx26
bash: passwd: 权限不够
[caozx26@localhost network-scripts]$ sudo su我们信任您已经从系统管理员那里了解了日常注意事项。
总结起来无外乎这三点：#1) 尊重别人的隐私。
#2) 输入前要先考虑(后果和风险)。#3) 权力越大，责任越大。[sudo] caozx26 的密码：
[root@localhost network-scripts]# echo 123 |passwd --stdin caozx26
更改用户 caozx26 的密码 。
passwd：所有的身份验证令牌已经成功更新。
[root@localhost network-scripts]# vim ifcfg-ens33
[root@localhost network-scripts]# cat ifcfg-ens33
BOOTPROTO=none
DEFROUTE=yes
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.17.2
[root@localhost network-scripts]#

仅主机1的克隆

[caozx26@localhost ~]$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope host valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000link/ether 00:0c:29:2a:70:8a brd ff:ff:ff:ff:ff:ff
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000link/ether 52:54:00:5b:77:d5 brd ff:ff:ff:ff:ff:ffinet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN group default qlen 1000link/ether 52:54:00:5b:77:d5 brd ff:ff:ff:ff:ff:ff
[caozx26@localhost ~]$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0
[caozx26@localhost ~]$