Linux

Mount [-t vfstype] [-O options] Device dir which 1.-t vfstype Specifies the type of file system, which is not usually specified. Mount automatically selects the correct type. Common types are: Optical or optical Image: iso9660 DOS FAT16 file system:

Download Installation Libfastcommonwget https://github.com/happyfish100/libfastcommon/archive/master.zip unzip master.zip CD Libfastcommon-master./ make.sh./make.sh Install Download Installation Fastdfswget

The memory space of Linux is simple and can be divided into 5 parts: Text (code area): Holds executable instruction operation, its read-only cannot write Bss (static or global): Host uninitialized global variables and static variables data (data

The following code allocates space to the memory file using Mmap, and uses fork to generate a parent-child process that synchronizes and deadlocks through the semaphore in Semaphore. Completes the synchronization of the parent-child process.

The collection and collation of some concepts: Writethough vs Writeback 1. Writethough Write-through means that the write operation does not use caching at all. Data is always written directly to the disk. Turns off write caching, which frees the

in Linux system memory allocation 2015-08-20 16:06 596 People read comments (0) Collection report Copyright NOTICE: This article is the original article, without the owner's permission to reprint. BSS (Block started by Symbol) typically refers to an

Library documents are used when connecting (static and shared libraries) and running (limited to programs that use shared libraries), and their search paths are configured in the system. The general Linux system/lib and/usr/lib two directories as

background: At first it was like this: there were a lot of web projects in a tomact, started, and after a while, found that it was not normal to access, the phenomenon is that Tomcat has been closed. Check log found: Tomcat error , this just know

After Linux is installed, the NAT networking mode is typically set up and no IP address is assigned to CentOS There are two ways to assign IP to a system. First type:dhclient: assigning IP to MachinesDhclient-r: Free IP Second KindNow assigning

Thinking: Through head and tail instructions, head command to see how many lines in front, tail instructions to see how many lines behind, for example: Some log log has a lot of rows, we get his 40th line of data, the idea is to get first 40 lines

1, through MyEclipse the project to generate Runnablejar file, such as Test.jar 2, create a new folder test, put the appropriate configuration file into this folder, , put this folder under a Linux system path 3, in the Linux system environment,

grep Command Brief Introduction Used to find a file that contains the specified template style, and if the content of a file is found to fit the specified template style, the preset grep instruction displays the column that contains the template

Sometimes you need to see how many files are in the folder, so you need to use the following instructions $ls-L | Grep-c ' ^-' What does a grep mean? We're man. $man grep You will see the following description: Synopsis grep [OPTIONS]

turn from: http://blog.csdn.net/coldsnow33/article/details/12917759Reference: http://lwn.net/Articles/302043/ an interrupted processing process1 The CPU executes the exception vector VECTOR_IRQ code when the interrupt occurs. 2 inside the

Linux kernel segment attribute mechanism Taking Subsys_initcall and Module_init as examples Subsys_initcall is a macro, defined in Linux/init.h. When you expand this macro, you find that the function of the macro is to place the function that it

Dmsg-c to clear the contents of ring buffer after displaying information Function Description: Displays the boot information.Syntax: DMESG [-cn][-s]Supplemental Note: Kernel will store the boot information in the ring buffer. If you do not have

Touch hello.c Create a file hello.c include the suffix of the file Cat hello.c View a file RM hello.c Delete file, will prompt to delete n whether Y is confirmation (may appear prompt) Rm-f hello.txt forced deletion, no hint Gedit hello.c to

The grep command in a Linux system is a powerful text search tool that uses regular expressions to search for text and print matching rows. This command is often used to parse a line of information, if it has the information we need, to display the

Df-h View/directory has been used more than 90%, so the root directory needs to be expandedOne, close your virtual machine system, find the following: Select "Edit Virtual mache settings" Click "Expand" Enlarge the space of the virtual machine to "4

A. What is LVM? Logical Volume Manager, which combines multiple partitions, hard disks, and even raid into a single storage device, and can expand or shrink space. The LVM consists of three layers: the bottom PV, the middle VG, the upper LV, as