Tag：kernel
-
Tutorial on installing Linux kernel header files on Linux systems
When you are compiling a device driver module, you need to install the kernel header file in the system. The kernel header file is also required when you compile user space programs directly linked to the kernel. When you install the kernel header file in these cases, you must ensure that the kernel header file […]
-
Introduction to Linux basic commands 13: startup process
firmware(Firmware) refers to the program code at the bottom of the device that allows the device to run. The simple understanding is: software fixed on hardware. Many devices in the computer have firmware (such as hard disk, mouse, optical drive, U disk, etc.), and the first thing to read is the firmware on the motherboard […]
-
Initramfs error after kernel upgrade. Problem solved
The prompt that initramfs cannot find / root / host or 437 or VFS appears: 1. If root The disk is on the FAT32 partition, so the kernel option should incorporate the fat related and font 437 into the kernel, and select y. 2. If Ubuntu has been installed before, after upgrading the […]
-
Android WebView uses Tencent X5 WebView to load video calls
Recently, the company has carried out peer-to-peer video calls on Android, PC Android, using webrtc, so the work on Android becomes very simple. Just load the video call page with a WebView. However, with the native WebView, only a few mobile phones can carry out normal video calls, including those with higher versions and those […]
-
Chrome rce 1day vulnerability recurrence
Vulnerability description Google Chrome is a free web browser developed by Google. Browsers that use a large number of chrome kernel will also be affected by this vulnerability. An attacker can exploit this vulnerability to construct a malicious web page, which will cause remote code execution when the user visits the page. Since the Chrome […]
-
Play with Android (mmkv storage device)
Reason for use: the multi-threaded value of shared preferences is invalid. A brother Xiong recommended using Xiangpiao mmkv storage sharp weapon, which won’t lose money. However, I played with the mentality of losing money. It’s really fragrant!! Mmkv advantages Using one of the zero copy technologiesmmapThe key value component of memory mapping can share the […]
-
[share] Interviewer: let’s talk about the principle of redis master-slave synchronization
1. Difference between MyISAM and InnoDB 1. InnoDB supports transactions, but MyISAM does not support transactions. This is one of the important reasons why MySQL has changed the default storage engine from MyISAM to InnoDB;2. InnoDB supports foreign keys, but MyISAM does not. Converting an InnoDB table containing foreign keys to MyISAM will fail; 3. […]
-
So sad! Eight years of deep drift, asking 500000 for Android development, met six companies, and didn’t get an offer!
Recently, when I visited the pulse of professional speech, the most I saw was that the client disappeared within two years. Android development couldn’t find a job. During this period of time, the news that I couldn’t find a job for one or two months came from Beijing, Shanghai, Guangzhou, Shenzhen and Hangzhou. A friend […]
-
[turn] 25 pictures, 10000 words, disassemble the Linux network packet sending process
Thanks to the author, Before starting today’s article, let me ask you to think about a few small questions. Q1: should we look at sy or Si when looking at the CPU consumed by the kernel to send data? Q2: why is net in / proc / softirqs on your server_ Rx is better than […]
-
How much CPU will soft interrupts eat you?
In the previous articles, we discussed the impact of process context switching and system call on system performance. Today, we’ll look at another CPU product, soft interrupt. When you check the CPU consumption of the system with vmstat or some other tools, you find that there are two columns listed separately: Hi and Si. They […]
-
[docker installation] detailed operation record
CentOS docker installation Docker supports the following CentOS versions: CentOS 7 (64-bit) CentOS 6.5 (64 bit) or later Version requirements Currently, only the kernel in the release version of CentOS supports docker. Docker runs on CentOS 7. The system is required to be 64 bit and the system kernel version is more than 3.10. Docker […]