Rsync through service synchronization, Linux system logs, screen tools

Rsync syncs through services

/etc/rsyncd.conf is the default profile for Rsync, the profile does not exist, and you need to edit the content

Operations on the primary server:

1, [[email protected] rsync]# cat/etc/rsyncd.conf

#启动的端口

port=873

#log文件

Log File=/var/log/rsync.log

PID File=/var/run/rsyncd.pid

#必须写服务端的IP

address=192.168.3.83

[Test]

#模块存的地方

Path=/tmp/rsync

#使用true后, files can only be transferred in/tmp/rsync

Use Chroot=true

#最大连接数

Max Connections=4

#设置为no后可以在客户端内上传数据到服务器端

Read Only=no

List=true

Uid=root

Gid=root

#auth Users=test

#secrets file=/etc/rsyncd.passwd

Can write IP, network segment

Hosts allow=192.168.3.76

2. Start the service

[Email protected] etc]# rsync--daemon

[[Email protected] etc]# PS aux | grep rsync

Root 7896 0.2 0.0 107636 668? Ss 10:36 0:00 rsync--daemon

Root 7898 0.0 0.0 103320 892 pts/2 s+ 10:36 0:00 grep rsync

3. Synchronize the/etc/fstab files to the/tmp/rsync directory on the client

[Email protected] ~]# Rsync-avp/etc/fstab 192.168.3.83::test/

4. Synchronize server-side content to Local on the client

[Email protected] ~]# RSYNC-AVP 192.168.3.83::test/passwd/tmp/222.txt

5. Add password file-security

Test: For an authenticated user

On the server:

New configuration file:

Auth users=Test

Secrets file=/etc/rsyncd.passwd

[Email protected] backup]# CAT/ETC/RSYNCD.PASSWD

Test: 123qwe

chmod 600/etc/rsyncd.passwd

Operations on the client

[Email protected] ~]# CAT/ETC/RSYNCD.PASSWD

123qwe

chmod 600/etc/rsyncd.passwd

Uploading the client's files to the server

RSYNC-AVZL/ETC/PASSWD--password-file=/etc/rsyncd.passwd Test@192.168.100.102::backup/

Download the files on the server to the client

Rsync-avzl test@192.168.100.102::backup//tmp/--password-file=/etc/rsyncd.passwd

Linux system logs

/var/log/messages System Total Log

/etc/logrotate.conf Log Cutting configuration file

/VAR/LOG/DMESG System Hardware Information log

/var/log/secure Security log file (root password input error will be logged)

Last

View user information for the most recent login

[Email protected] logrotate.d]# last-3 #最近3次的信息

Root PTS/4 192.168.3.81 Mon Nov 6 15:08 still logged in

Root PTS/3 192.168.3.81 Mon Nov 6 14:44 still logged in

Root pts/0 192.168.3.81 Mon Nov 6 14:35 still logged in

Lastb

To view the user who failed to log on; the corresponding log file/var/log/btmp

Screen tool

Represents a virtual terminal that runs in the foreground

Keep a script running in the background without interrupting

Nohup./test.sh &

Installation:

Yum install-y Screen

[Email protected] rsync]# screen #直接进入一个bash

[[email protected] rsync] #ping www.baidu.com

Ctral a combo key and press D to exit the virtual terminal, but not the end

Screen-ls viewing the virtual terminal list

Screen-r ID into the specified terminal

[[email protected] rsync]# Screen-ls #Pts-1.test: expressed as a name, or you can customize it yourself

There is a screens on:

11496.pts-1.test(Detached)

1 Socket in/var/run/screen/s-root.

[Email protected] rsync]# Screen-r 11496

[Email protected] rsync]# screen-s Ping #直接指定名称

[Email protected] rsync]# screen-r Ping #进入

This article is from the "Discover new things" blog, make sure to keep this source http://shenj.blog.51cto.com/5802843/1979311

Rsync through service synchronization, Linux system logs, screen tools