Linux

Introduction to the orphan process The parent process ends before the child process, and the child process becomes an orphan process, and the parent process of the child process becomes the INIT process, called the INIT process adoption Orphan

Linux gateway information is stored in the routing table, and getting the gateway is actually the query for the routing table. User space Get gateway addressThere are two methods, one is read from the/proc/net/route, this is the simplest, most

information interaction initiated by user space Write your own system call Linux currently provides more than 200 standard system calls, and allows us to add our own system calls to implement the information interaction with the kernel. Writing

Method/Step First we connect to the Linux server Use Iptables-l-N to view current firewall rules You can use iptables-l-n--line-number to view the serial number of each rule chain, so that you can delete the specified rule. For example, when we

There's still time today, and I've always wanted to take the time to write about what the Linux kernel principle is about, the focus is not in the code, but in the internal principles and mechanisms, so that everyone on the Linux kernel has a

The Linux namespace, abbreviated as NS, was introduced into the 2.4.19 kernel in 2002 and has grown to today for 15 years. 2010 years later, the domestic cloud computing burst, followed by the rise of the 2013 Docker, NS only as an indispensable

Linux projects written with makefile a project must Top layer Makefile Makefile.build subdirectory makefile two compilation process Start recursively into subdirectories from the top level, and start using GCC to compile when you go to the bottom

There are two ways to achieve this: Method 1: Using the SVN merge 1 First SVN up, to ensure that updates to the latest version, such as 20; 2 then use the SVN log to view the history changes and find the version to restore, such as 10. If you want

1.vim code editing tools to solve the VI writing code, the direction key appears incompatible sudo apt-get install vim 2.minicom serial Debugging tools, with embedded Development Board serial debugging sudo apt-get install minicom 3.nfs Server

1, download ffmpeg.Search on the Internet or download the official website 2, decompressionTar command decompression 3, configuration./configure--enable-shared--prefix=/usr/local/ffmpegWhere:--enable-shared is allowed to compile a dynamic library,

1. Basic Concepts. Java_mem_opts= "-server-xmx2g-xms2g-xmn512m-xx:permsize=128m-xss256k-xx:+disableexplicitgc-xx:+ Useconcmarksweepgc-xx:+cmsparallelremarkenabled-xx:+usecmscompactatfullcollection-xx:+usefastaccessormethods-

When you encounter no flash plugin, download one to the official website: http://get.adobe.com/cn/flashplayer/ I downloaded is: install_flash_player_11_linux.i386.tar.gz OK, start the installation. 1. Find the correct directory #whereis Firefox

In the server cluster network card binding is often used is also more practical, the following about the previous version of redhat7.0 (especially Red Hat 6.5-7.0) with the Bond method to bind the network card. The following demo is done on the

1. Library: is essentially a binary form of executable code. There are two types of libraries under Linux: static libraries and dynamic libraries (shared libraries) 1.1 static libraries: When the program is compiled, it is connected to the target

1, view the current logged-in user [WILSH@LCL ~]$ Whatis w (1)-show The Who are logged on and what they are doing [WILSH@LCL ~]$ W 09:49:30 up 1 day, 17:19, 4 users, load average:0.00, 0.00, 0.00 USER TTY from login@ IDLE

[Root@linux var]# df-hl file system capacity used available% mount point /dev/hdb2 75G 75G 0 100%/ /dev/hdb1 99M 9.2M 85M 10%/boot none 251M 0 251M 0%/dev/shm What does that

Yesterday, the installation and configuration of the JDK, the installation of the JDK can be installed after the Tomcat and MySQL database, today first to say Tomcat installation and deployment. Compared to the installation of JDK, Tomcat

Linux is a multiuser system that, once connected to a network, can serve multiple logged-in users at the same time. System administrators can keep abreast of the users in the system and what they are doing. to view the actions of a userIf the system

Now there are multiple CPUs and multiple memory blocks on the machine. We used to look at the memory block as a chunk of memory, and all the CPU access messages to this shared memory were the same. This is the SMP model that was commonly used before.

Linux Basic Environment Settings Here we have a few things to set up: * Static IP: Why the need to set static IP (usually use Linux system is required to provide services, as the server needs a fixed IP address, is a static IP address. This will