When a Linux system encounters a problem, we not only need to view the system log information, but also need to use a large number of performance monitoring tools to determine which part (memory, CPU, hard disk ......) An error occurred. In Linux, all running parameters are stored in the virtual directory/proc. In other words, the data value obtained by the performance monitoring
Use the graphical tool MySQL WorkBench to remotely manage MySQL in Linux
If you run a MySQL server on a remote VPS, how do you manage your remote database host? Web-based database management tools such as phpMyAdmin or Adminer may be the first thing you think. These web-based management tools require a functioning backend web service and PHP engine. However, if your VPS is only used for database services (f
to the security of the local machine, but a threat to the security of other computers on the network.
Installation of network data collection and analysis tool TcpDump
In linux, the installation of tcpdump is very simple. Generally, there are two installation methods. An rpm Package is used for installation. In addition, it is installed in the form of a source program.
Rpm Package installation: the simpl
Installing the cross-compilation tool arm-linux-gcc-4.3.22011-07-08 00:55:28| Category: Embedded | Report | Font size Subscription Environment: Fedora 9STEP 1: Download arm-linux-gcc-4.3.2.tgz.Put arm-linux-gcc-4.3.2.tgz in a directory, I put it in/opt。download Site 1: http://www.arm123.com.cn/
Since the first HELLO program has been completed, it indicates that the entire compilation environment is no longer correct. Now, let's prepare a serial port testing program. As the serial port driver development board has been completed, let's take a look at a simple Linux serial port testing tool for data sending and receiving.
Common online versions of Linux s
The Linux test tool tcpdump command is used to monitor TCP/IP connections and directly read data headers at the data link layer. You can specify which data packets are monitored and which control formats are to be displayed. For example, to monitor the communication between all Ethernet connections, run the following command: tcpdump-I eth0. Let's take a look at the specific content.
Even on a relatively ca
Guide
This article will introduce a very useful tool--netdata, which is a real-time Linux performance monitoring tool, for an open source tool, I have a translation of its English documents, the level of limited, there are translation errors in the place to welcome everyone to point out, I hope this article to hel
1. Questions: recently in the real-time synchronization of the log, before the online is done a single part of the online log stress test, Message Queuing and client, the machine is no problem, but did not think of the second log, the problem came: a machine in the cluster top see the load high, the cluster of machine hardware configuration, the deployment of software are the same, but only this one load problem, the initial speculation that there may be hardware problems. at the same time, we
Linux task management tool-Crontab
Crontab is a tool used to execute routine tasks cyclically on the Linux platform. in Linux, cron (crond) is a system service used to control tasks, in Linux, many scheduled tasks need to be start
Now many people have installed Linux, and there will be many problems in the application of Linux. This article gives you a detailed introduction to the Linux screenshot tool, which plays a certain role in learning the Linux screenshot t
The Nmon is a system administrator-oriented tuning and benchmarking tool that can be used to display performance data about the following:
Processor
Memory
Internet
Disk
File system
Network File System (NFS)
The process that consumes the most resources
Resources
Power Micro-Partitioning
One of the places I really like about this tool is that it's completely inte
One step forward and one step closer, good and webbench can simulate up to 30 thousand concurrent connections to test the load capacity of the website. I personally feel better than the AB stress testing tool that comes with Apache, installation and use are also very convenient.
1. Linux stress testing tool:
2. Compile and install the
Linux network settings 3 mdash; note when using the ssh tool 1. how does the ssh tool use ssh (SecureShellClient) to install it on windows, while on linux there is a service called sshd, this service occupies port 22, which is started by default. However, Port 22 is not trusted by default and needs to be set manually.
Article title: Linux platform burning tool NeroLINUX3.5.2.0. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
We all know that Nero is the king of data burning on the Windows platfor
Introduction
"Oops, the system crashes ..."
"Oops, the program crashes ..."
"Oops, command execution error ..."
For maintenance personnel, such tragedies are happening every day. Ideally, the system or application error log provides enough comprehensive information. By viewing the relevant logs, the maintenance staff can quickly locate the cause of the problem. However, in reality, many error logs are printed to simulate the occurrence of errors (for example, "cocould not open file", "connect t
system call. In fact, we can define the error range by observing these system calls, their parameters, and return values, even find out the root cause of the problem.
In Linux, strace is such a tool. Through it, we can track system calls generated during program execution and receive signals to help us analyze exceptions encountered during program or command execution.
A simple example
How to use strace to
This section describes open-source tools and code tracing technologies used to improve the security and reliability of Linux applications.
I. Source Code check tools
During software development, we can use source code check tools to identify common programming errors and security vulnerabilities. These tools are not complex to use. The following describes how to use the splint and flawfinder source code check tools.
Splint is a static source code chec
Among today's many hacking technologies, sniffer is the most common and important technology. Anyone who has used the sniffer tool on windows (for example, netxray and snifferpro) may know that in a shared Lan, using the sniffer tool can provide a clear view of all the traffic in the network! Among today's many hacking technologies, Sniffer (
Sniffer) Is the most common and important technology. I have used
Linux source code analysis tool chainPreface
Viewing source code is a must for programmers and a shortcut to improving their capabilities. I personally think: the only way to fully master a software is to read the source code.
I have the source code reading software sourceinsight in Windows (although I have never used it, it is a good evaluation on the internet). Because I am a Linuxer, I don't like to use
After more than a decade of development in Linux, many users are familiar with Linux. Here we will introduce cron's understanding in Linux and discuss it with you. Cron is a Linux scheduled execution tool that runs jobs without manual intervention. This document does not des
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