Debug sharp weapon GDB (I) 1.1 GDB first know 1.1.1 what is the debugger (gnu debuger) in the GNU project, can follow the execution of the program, but also can restore the state before the program crash 1.1.2 Why do you need GDB? Of software products
Programming under UNIX/Linux must pay attention to several problems (especially in the development of IDE or programming tools running on Windows): 1. Case issues. In the naming rules of files or directories, special attention should be paid to the case sensitivity of hump naming. Some languages
Tried several solutions, change the computer, change the card reader, and finally give up using this software for burning. Use the command line to burn under Linux instead. Solution: 1: I am a virtual machine installed in my computer, so I can't use the SD card reader that comes with my laptop.
Shell has become the first choice of system administrators because of its stability, efficiency and flexibility. 1. Shell introduction: command line: refers to the interface for users to enter commands, which only accepts input and then passes the commands to the command interpreter. Shell: the command interpreter. In essence, Shel
Operating environment 1 operating system: redhat 6.5IP address: 192.168.10.128 hostname: zred2 operating system: win 7IP address: 192.168.10.10 confirm the interconnection between the two hosts. Request:
1. HarborHarbor is an open source enterprise Docker Registry project of VMware: (1) advantages of Harbor: role-based control; mirror-based replication strategy; support for LDAP / AD; image deletion
Topas command nmon command
First, the preface server will sometimes be destroyed, and cpu will soar inexplicably. In order to see which IP visits are too frequent, you can use netstat, awk and other instructions to check statistics. 2. Instructions summarize some commonly used instructions as follows: 1. Common instructions connect IP according to the number of connections
In the previous course, we had a general understanding of the composition of CPU, what is the structure of the arithmetic unit and controller of CPU, and what is the main function, so in section 8, we will see how the arithmetic unit and control of CPU are realized through electronic components, or electricity.
Environment description: [root@ops-drone-cicd-1 drone] # cat / etc/redhat-releaseCentOS Linux release 7.4.1708 (Core) [root
1. Computer hierarchy 2. At the heart of every Unix, Linux, and BSD system is the kernel. The kernel is all Unix, Linux,BSD systems.
[background] the issue of ipv6 has been put on the agenda again this year, and the Ministry of Industry and Information Technology has been pushing it. I wonder if everyone is engaged in it. The request we received here is like this: at first, it just said that Q4 only needed to ensure that the main business functions in the test environment could operate smoothly in the ipv6 environment, but suddenly became
Centos7+docker+Jenkins+svn builds automated deployment platform 1. Centos7 reference link: http://www.macrozheng.com/#/reference/linux_instal
Origin: follow the development board to learn Linux, using functions such as chmod, the experiment in the video is explained in detail. However, if there is no other material to support, just look at the description of man, who knows what these custom types are primitive types? To take a simple example, chmod:
Dokuwiki installation (linux) one. Dokuwiki is an open source wiki engine program that runs in PHP environment. No database is required. The Doku Wiki program is small, powerful and flexible, and is suitable for the management of the knowledge base of small and medium-sized teams and individual websites.
The three commonly used instructions for storing data are: set, add, and replace. Set instruction: is to save data called key directly to the server (regardless of whether the data exists or not); add instruction: is to add a data to the
Experimental environment: Centos7.6 version system (three hard drives) Experimental requirements 1: create LVM logical volume (40G) and expand it to 50G2: set disk quota for tom users and verify 3: set disk quota for finance group (finance) and the amount of space allocated by tom users
Every Exchange administrator has the need to monitor the daily mail queue: how many messages are sent, how many messages are received, and how many messages are blocked by policy and anti-spam, and queried every time in the Exchange Management Shell window
What is a firewall? Firewall refers to the protective barrier formed by the combination of software and hardware, between the intranet and the extranet, and between the local area network and the extranet. Like a wall, it can build a secure gateway between networks to protect the intranet from illegal users. Friends who are familiar with the Internet
For production data, the security of data is very important, and any loss of data may have serious consequences. Backup, as a copy of data, can reduce the loss when the database fails or is destroyed, according to the backup database and transaction log files can be restored to the nearest point in time.
