Cloud Applications

Introduction: The embedded linux system environment has been widely used in the embedded field due to its ease of transplantation and reduction, high kernel filial piety efficiency, integrity, open source code, and excellent performance. Linux USB

Understand LVM management in Linux: LVM is short for LogicalVolumeManager (logical volume management). It is a mechanism for managing disk partitions in Linux, it can create a virtual disk volume Group (VG) on multiple physical volumes (PVS), and

1. modify the number of files that can be opened by a user process on the Linux platform. whether writing a client program or a server program, during high-concurrency TCP connection processing, the maximum number of concurrent connections is

LVM is short for LogicalVolumeManager (logical volume management), which is implemented by HeinzMauelshagen on the Linux2.4 kernel. LVM logically sets partitions of one or more hard disks, which is equivalent to a large hard disk. when the hard disk

By viewing the Nginx concurrent connections, we can clear the load of the website. There are two ways to view Nginx concurrency (the reason is that I only know two ways), one is through the web interface, the other is through the command, web view

According to the company's needs, to build a file server, we first thought of Samba. secondly, to facilitate the expansion of the disk space occupied by each department, we decided to adopt lvm. The process is as follows: 1. create a linux partition

In the SMP system, our applications often use multithreading technology. how can we view multiple threads of a process in Linux? This article introduces three commands to view the Linux system threads (LWP): in my system, with the qemu-system-x86_64

We all know that initrd is a memory file system started in linux. what is in it? Today, let's take a look at how to open this file system! Initrd = initramdisk is a file system that exists in the memory at startup. Initrd was initially designed to

NICchannelbondingallowsmultiplenetworkcardstoactasone, allowingincreasedbandwidthandredundancy. let & #39; sassumewehavetwonetworkinterfaces (& quot; eth0 & quot; and & quot; eth1 & quot;) a NIC channel bonding allows multiple network cards to act

View permissions [ruby] viewplaincopy in terminal input: ls-lxxx.xxx (xxx. xxx is the file name.) similar information will appear, mainly including-rw-r -- [ruby] viewplaincopy, where: the first-represents the three rw in the middle of the

Cryptsetup is a partition encryption tool in linux. it is a partition-level encryption tool that works at a lower level than the file system level. it creates a file system on an encrypted block device, last mount and use. 1: create a common logical

As we all know, linux devices are very special. The system always reads the device in the same way, and the difference between devices is done by the device driver. Because of this, it is very easy to manage devices. Linux also provides virtual

CentOS uses vim/vi to encrypt and decrypt files. 1. use vim/vi to encrypt files. Advantages: After encryption, if you do not know the password, you cannot see the plaintext, including root users; disadvantages: clearly let others know about

Because the first time I used the hyper-v architecture VPS, I had to specify whether to install windows or centos before I bought it. because of the re-installed panel, I am really suffering from debian, various minor problems encountered during the

In fact, I have also written a blog post about bind dual NICs in Linux. Today, I conducted another binding experiment and found that it is much simpler than the original binding. It may be caused by different system or system versions. A series of

Command: e2fsck permission: Super User usage: e2fsck [-pacnydfvFV] [-bsuperblock] [-Bblocksize] [-l |-Lbad_blocks_file] [-Cfd] device description: check whether the partition of the Linuxext2 file system works properly. parameter: device: Hard disk

Yesterday, we encountered a situation where we wanted to delete a large number of files in Linux. we needed to delete several 100,000 files. This is the log written by the previous program, which is growing fast and useless. At this time, the common

Function description: decompress the. arj file. Syntax: unarj [eltx] [. arj compressed file] Supplement: unarj is the compression program for. arj compressed files. Parameter: e decompress the. arj file. L display the files contained in the

Understand what a swap partition is. Swap is a virtual memory partition in Linux. its main function is to release some space in the physical memory when the physical memory is insufficient, for the current program to use, the space released from the

Alias command function description: some of the commands that we often use but are very long at system management. Then we can create an alias for these long strings of commands. This long string of commands can be directly replaced by an alias. The