little investigations

These two days have been plagued by the following mistakes: Ap13:lb-m Ccmscell uptime ld.so.1:uname:fatal:/usr/lib/secure/0@0.so.1:open failed:no file or directory such 6]: 4412 killed ld.so.1:uptime:fatal:/usr/lib/secure/0@0.so.1:open failed:no such file or directory LB is a script that invokes Rsh, Ccmscell is a server pool,uname is invoked in lb. Careful study of n-time related scripts, Google the N-Times related error messages, did not find a valuable clue. She later asked an IT colleague w

First, the Nginx server solves the method The server is using Nginx, to add the Access-control-allow-origin field to the head of the response, add the method by using the Add_header directive: Configuration Example: Copy Code code as follows: location/assets/{ Gzip_static on; Expires Max; Add_header Cache-control public; Add_header Access-control-allow-origin *; } Two, the Apache server solves the method Font Awesome (Firefox cannot show Firefox cannot be displ

mistakenly assume that the service is not interrupted. To be precise, Ajax does not improve the speed of downloading data from the server side, but only makes this wait less frustrating. But this is enough to have a huge impact and shock, and it actually has a huge impact on desktop software. This I use an example to illustrate, we can compare the Outlook Express and Gmail, the former is a typical desktop software, the latter is implemented by Ajax B/S mode, in fact, the latter is now slowly re

Today, a problem was encountered on the server, the subdirectory could not be created in the directory, exception: mkdir: Unable to create directory "...": Too many connections Before the original understanding is wrong, Linux on the directory of the number of files is basically unlimited (limited to the inode can be ignored), but for the directory of the number of subdirectories are indeed limited, up to 31,998. The following content reproduced from: http://www.51testing.com/?uid-225738-act

question one by one. Each question consists of a question , a question subtitle , a response type , a required (whether required), and a default answer , where the response type includes text , Paragraph text , number , date , time , Yes/no , choice , etc., can be said to cover almost all of the online survey problem type of nearly all needs. Note: After the questionnaire design was completed, Excel Online automatically generated a questionnaire with the title bar of questionnaires, waiting f

Through a few days of product measurement and a wide range of user surveys, we found that in the field of the network accelerator, in fact, the user most value is two: first of all, the network acceleration effect, of course, the user more value is the product service reputation. From the results of the products measured, we found that the current industry technology is relatively leading the Internet Express, unified, fast travel, proud shield and other brands. However, from the service reputa

Friday encountered the development of the request to assist in the data booking program in the single and other tables to retrieve data when retrieving the condition Mantissa is 9 of the data particularly slow. The first time to think of whether there are several issues: 1, the database the most relevant data; 2, the data table has been partitioned, and the corresponding data fall in the partition performance problems; 3. There are many conversations to retrieve the batch records; But it soo

almost completely defeated, and at this point a colleague discovers the mystery: geography . When we mark the geographic information of the data and compare all the information by region, we see an asymmetry increase in the flow of the region, such as Southeast Asia, South America, Africa, and even Siberia. Further investigations revealed that, in these areas, the average loading time for the feathered pages was more than 2 minutes! This means that

The bell is ringing ... wake up in the middle of the night by a rush of phone bells, the annual service customers call to the need for the investigation and removal of mail. Ask why, it turns out that someone in the organization has sent an unhealthy message about the leader and forwarded it within the enterprise, and the leader asked to find such messages and delete them immediately. Administrators know the leadership of the violent temper, dare not neglect! It's not difficult to find the wron

may be helpful for legal investigations. Record the volume label, marker, and date of the backup and save it to a safe place to maintain data integrity.C. Intrusion AnalysisNow you can review the log file and system configuration file to check the clues of intrusion, the system modification by intruders, and the vulnerability of system configuration.1. Check for system software and configuration file modifications by intrudersA. Verify all binary fil

understand what to do;· may not be set as required;· You might think that you know what to do (for example, you don't usually read the instructions).When testers encounter these problems, they often find unexpected bugs. Sometimes these bugs are trivial, but deeper investigations will find more serious problems .Many problems can be pre-determined and tested. The following questions are not relevant when testing the mobile app, but you can also try a

has to be said that after the loss of the mobile phone business, the patent has indeed become an important source of Nokia revenue, according to the relevant statistics, before the Nokia patent authorized manufacturers, Apple, Samsung is the biggest profit, followed by Motorola, HTC, BlackBerry, LG and Sony and other international brands of mobile phone manufacturers. But now, including Samsung, HTC and other in the mobile phone business in the downturn, but also directly affect the patent reve

different user is instructive for testing.Testers may envision themselves as the following users:· have no experience;· Have a lot of experience;· Lovers· Hackers· Competitor.Of course there are more optional roles, depending on what product you are developing. In fact, in addition to character characteristics, its operational behavior and workflow is also very important. The way people use products is often strange, such as:· Returned when it should not be returned;· Impatient and repeatedly k

Guide Security experts at Sucuri, a cyber security firm, said they found 68% of the hacked sites had hidden backdoor backdoor scripts in their investigations. These backdoor scripts provide intruders with access to the secret channel again, and even if the system administrator changes the password or applies a security patch, the backdoor will remain as long as the entire system is not completely cleaned up. From their published site b

Security experts at Sucuri, a cyber security firm, said they found 68% of the hacked sites had hidden backdoor backdoor scripts in their investigations. These backdoor scripts provide intruders with access to the secret channel again, and even if the system administrator changes the password or applies a security patch, the backdoor will remain as long as the entire system is not completely cleaned up.From their published site by the Black report Q1 v

Microsoft is so fearful of the impact of Ajax and, in its recent investigations, sees Google as one of the main reasons for its major rivals in the next 10 years. Of course, this change does not completely eliminate the desktop software, and the existing browser does not have a desktop program like Photoshop to deal with complex images. But we cannot ignore the impact of it.3, about the name of AjaxThe full name of Ajax is asynchronous JavaScript and

with Mysql modules, starting from main, we are bound to introduce ourselves into a dead end. We can't afford to worry about anything. After thinking, I want to debug the server through the client to learn the server code. That is to say, through the action of the client, we can see the response of the server. For example, from the Client Login action to see how the SERVER communicates, user identification, authentication, and task allocation, through create table, let's look at how the SERVER

to other non-interference channels. Obviously, this federal regulation requires that the access point channel be dynamically changed, which will inevitably affect the 5 GHz channel planning. Although some problems may occur when DFS is included in a 5 GHz 802.11n deployment project, the DFS band (5.25-5.35GHz and 5.47-5.725 GHz) the optimal planning does not change much compared with the non-DFS band planning. The first step in the deployment process is to conduct on-site

The log on the servlet side shows that the JSON parameter passed by the client is null.But the log on the client shows that the JSON parameters have been passed.It is found that the JSON parameters after the addition and subtraction of 1 bits can be transmitted normally.Only JSON parameters with 8192,4096 length cannot be transferred properly.Considering the particularity of the 8192,4096,2048,1024, continuing investigations revealed that the problem

, the msg returned by success must be null (under the chromium browser), but actually there is a return value, it is also normal if no file exists. What's more terrible is that the Json return value is prompted to be downloaded under IE/EDGE. I flipped through the source code of jquery. form. js and found that it is a pseudo Ajax implemented by Iframe, not halal, Pass! // are there files to upload?var files = $('input:file', this).fieldValue();var found = false;for (var j=0; j When there is no