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54 Lessons (EXPORTFS commands, NFS client issues, FTP introduction, using VSFTPD to build FTP)

virftp:virftp /home/virftp Defining where a password file is important [[emailprotected] vsftpd_user_conf]# vim /etc/pam.d/vsftpd ##这是用来认证的一个文件auth sufficient /lib64/security/pam_userdb.so db=/etc/vsftpd/vsftpd_loginaccount sufficient /lib64/security/pam_userdb.so db=/etc/vsftpd/vsftpd_login Edit the VSFTPD Master profile [[emailprotected] vsftpd_user_conf]# vim /etc/vsftpd/vsftpd.conf将anonymous_enable=YES 改为 anonymous_enable=NO ##不允许匿名用户 将#anon_upload_enable

"Deep Exploration C + + object Model"-about objects (object lessons) __c++

Preface "This book is written by a compiler designer for senior C + + programmers. The assumption behind this book is that programmers who understand the C + + object model can write code that is less prone to error and more efficient. ” It is because of the loss in the actual programming that I feel that reading this book is very necessary, such as a previous blog post: http://blog.csdn.net/jiange_zh/article/details/51871782 If you had read this book, you would not have been confused. Here are

Yesterday to Anhui Susong a customer there to maintain the experience and lessons

Yesterday to Anhui Susong a customer to do maintenance experience and lessons customer's database server would have been good, and I was trying to show someone how to install Oracle's clients. Oracle client installed on the server, half of the time I suddenly felt I found a great error: Oracle server can no longer install Oracle client, I quit but late: fee management system can not connect to the database, PB can not connect to the database, DBA

A few lessons to share as a personal webmaster

Review the mistakes made by zcom over the past year and share some of the lessons of last year. The biggest mistake is losing focus . We did a lot of acquisitions last year, we made a lot of investments and even invested in an in-house media company. The mode of their magazine is to put a magazine rack in the hotel room, and put their own and outside magazines to sell ads. They want to replicate Jiangnan spring's niche pattern, where we felt there was

Internet product design Lessons and experience: delete Confirmation not less

that the user can complete the operation, but also these dangerous operations with split line and normal operation of the Division, reduce the possibility of user misoperation, the recent user use of this kind of problem is much less. Have previously shared a confirmation page design in Google Reader series, if you look again may avoid this mistake ~ Confirmation Page Design (confirmation alert) (i)--timing of use Confirmation Page Design (confirmation alert) (ii)--the choice of form

Eight Lessons from COM experience

In my daily work, I have seen many COM codes written by different developers. I was amazed by the many creative ways of working with COM, and some of the clever code that made COM work might not even have occurred to Microsoft. Also, seeing some mistakes repeated again and again made me frustrated. Many of these errors are related to thread and security, and this is exactly the two areas that are missing from COM documentation. If you do not plan carefully, they are also the most likely to encou

Summary of the second week of Access lessons

Tags: many direct span data AC content close Basic access1. What knowledge has been learned in this lesson?(1) Database creation: Create empty data directly, create a database from existing files, and create a database using a template.(2 basic operation of the database: the opening of the database (the default) exclusive mode, read-only mode, and exclusive read-only mode) are turned off.(3) Basic maintenance of the database.(4) The Access data type.2. What are your experiences?Recognizing the m

Lessons learned from Linux to modify the user name of the root account

file,Both sides of the user do not correspond, resulting in the inability to login, and then find the appropriate solution on the Internet, most of the solution to the use of single-user mode to reset the password, but the server in the customer's company, but alsois to contact them to solve, no way, things have reached this point, can only solve, so later trouble customer company maintenance personnel to deal with, very sorry.Online query, found that they are not a person, but this problem, I

2018-4-22 17 weeks 4 Lessons Shell alarm System script Configuration

# #发送邮件Fiecho "' Date +%t ' 502 $c _502"disk.sh Content#! /bin/bash# #Writen by alex##Rm-f. /log/disk.tmplang=enFor R in ' Df-h |awk-f ' [%]+ ' {print $} ' |grep-v use ' # #以一个或多个空格或% as delimiterDoIf [$r-gt] [$send-eq "1"]Thenecho "$addr ' date +%t ' disk useage is $r" >> /log/disk.tmpFiIf [-F. /LOG/DISK.TMP]ThenDf-h >>. /log/disk.tmp/bin/bash. /mail/mail.sh $addr \_disk $r. /log/disk.tmpecho "' Date +%t ' disk useage is Nook"Elseecho "' Date +%t ' disk useage is OK"Fi [%]+ represents o

2018-4-17 16 weeks 5 Lessons shell script date, if

later[[email protected] ~]# date-d "+1day" April 18, 2018 Wednesday 21:46:48 Cst[[email protected] ~]# date-d "+1day" +%f2018-04-18date-d "-1 days" a day agodate-d "-1 month" Month ago # #年year[Email protected] ~]# date-d "-1 month" +%F2018-03-17date-d "-1 min" A minute ago # #小时hour, seconds second[[email protected] ~]# date-d "-1 min" +%t21:47:09[[email protected] ~]# cal April 2018 1,234,561 2 3 4 5 6 78 9 10 11 12 13 1415 16 17 18 19 20 2122 23 24 25 26 27 2829 30 20.4 variable

2018-1-4 4 weeks 3 lessons VIM 2

action (U)10, replace all the etc in the entire file with a CTE (1, $s/etc/cte/g)11, move the cursor to line 25th, delete the string "ly" (25G then press J to move the cursor to the right to find "lyl", press V to select, then press x)12, Restore previous action (U)13, delete line 50th (50G DD)14, Restore previous action (U)15. Delete all contents of 第37-42 (37G 6DD)16, restore previous action (U)17, copy the contents of line 48th and paste it below line 52nd (48G yy 52G p)18, restore previous

Linux Eight week three lessons (March 28)

Tags: LinuxEight weeks three sessions (March 28)10.32/10.33 rsync via service sync10.34 Linux system logs10.35 Screen ToolExtended Linux log File Explorer Logrotate http://linux.cn/article-4126-1.html Xargs Usage Detailed http://blog.csdn.net/zhangfn2011/article/details/6776925 10.32rsync synchronization via service (UP)Open two virtual machines, a machine 192.168.133.130,b machine 192.168.133.130, two machines can communicate with each other.A machine file is synced to machine

Eight weeks three lessons rsync syncs through services, Linux system logs, screen tools

/wtmpUsed to view the correct login history, he is a binary file that cannot be viewed by cat and can only be viewed with last.LASTB command to view the user who failed the login, the corresponding file is/var/log/btmp/var/log/secureHe is the log that logs the login failure. He is also a binary file and cannot be viewed by cat./var/log/secure Security LogHe logs log-in related, Pam-related, and so on. If someone has hacked our device, it will also be recorded in this file.Screen toolVirtual Term

Linux 14 week two lessons (May 10) Notes

315.1 FTP Introduction15.2 using VSFTPD to build FTP service (top)Install the VSFTPD software package, the command is as follows;Create a virtual user with the following command:Edit the file virtual user's password file.Write content, odd behavior user command, even behavior password.Need security, not everyone can read, set permissions, command as follows:Go to DirectoryTo the first user, create the first configuration file. The configuration file and user name are the same.Copy the following

2018.5.7 seven weeks Two lessons (monitor IO disk performance, free memory usage, ps,linux under grab packet)

PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMANDroot 1 0.0 0.6 128164 6824 ? Ss 5月06 0:02 /usr/lib/systemd/systemd --switched-root --system --deserialize 21root 2 0.0 0.0 0 0 ? S 5月06 0:00 [kthreadd]root 3 0.0 0.0 0 0 ? S 5月06 0:00 [ksoftirqd/0]....... How to see if a process is running, as in the following example:[[Email protected] ~]# PS aux | grep nginxRoot 44476 0.0 0.0 112676 984 pts

20170507Linux seven weeks two lessons IO monitor free PS network status grab

. The disadvantage is that the name of the process is not displayed.Linux under Grab BagGrab Bag Tool tcpdumpSee which packages are coming in. And the flow of data, length. The default is TCP packets, if you find a lot of UDP packets are likely to attack. Eg DDos UDP flood. Access to professional anti-attack devices or services only.TCPDUMP-NN NIC Name-nn the first n means that the IP is displayed as a number without displaying the hostname.Time source IP and port > Destination IP and port: Pack

thinkphp Project CMS Content Management System Development Video tutorial "20 Lessons" (3.02GB)

.rmvb 155MB9th Talk thinkphp build CMS article content component 02.rmvb 122.6MB10th talk thinkphp build CMS menu Management 01.rmvb 147.6MB11th talk thinkphp build CMS menu Management 02.rmvb 138.2MB12th Talk thinkphp build CMS Rights Management. WMV 205MB13th Talk thinkphp build CMS module management. RMVB 180.4MB14th Talk thinkphp build CMS template management 01.rmvb 174.6MB15th talk thinkphp build CMS template management 02.rmvb 145.9MB16th talk thinkphp build CMS function Integration 01.rm

A summary of lessons learned from C + +

a sense of accomplishment.C. To have a complete example of how each knowledge point is used, please note that what is said here is not a single piece of code. Because you've never been exposed to programming in C + + before, the complete code can make you have a whole concept and be able to do a lot of practice quickly, since programming is the beginning of imitation, and the complete code tells you a complete step. Don't have to speculate on your own.D. Recommendation: "C + + Primer Plus"2. Wh

9 Lessons to build teamwork projects with Go

This is a creation in Article, where the information may have evolved or changed. Original: Go learn:learning as we GoAuthor: Senior engineer of Peter Kelly,teamwork Desktranslation: Wei SunZebian: The dawn of money, focus on architecture and algorithmic areas, seek reports or contributions please email qianshg@csdn.net, another "csdn Senior Architect Group ", there are many well-known internet companies, Daniel Architects, welcomed the architect plus qshuguang2008 application Group, notes

Android Enterprise Application Development Complete training: 24 Lessons on Android Business-class development best practices

From the perspective of enterprise-level business practice, 24 hours through 23 hands-on practical cases, the gradual progress of the Android business-level application development points conquer, Based on years of Android (6 complete hardware products and more than 20 application software) development and enterprise-level training experience (more than 150 times Android's enterprise internal training and public lessons), designed to help you complete

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