Linux

Access to the server through SSH, it is inevitable to use compression, decompression, packaging, unpack, etc., this time the tar command is essential to a powerful tool. The most popular tar in Linux is though small, spite, and powerful. The tar

The chmod command is used to change access rights for Linux system files or directories. Use it to control the access rights of files or directories. There are two ways to use this command. One is the text-setting method that contains the letters

Environment RedHat Linux 9 + vwware 8.0 + SSH 3.2.9 + Putty 0.62 Problem Pack compressed war, unpack war packs, and JAR commands under Linux Solve Pack the files in the Project_a folder into Project.war 1. Packing JAR-XVF

Task requirements Research and Development Department developers David and Peter belong to group A; The Administrative department personnel Jack and Mike belong to Group B; 1, the establishment of a shared directory "/project_a", the directory

Docker is an Open-source tool that runs applications in Linux containers, a lightweight virtual machine. In addition to running applications, Docker also provides tools to simplify the deployment of complex applications by distributing applications

SU's usage: Switch user The usage # SU [l] User name [] can be abbreviated or not written. Change Password # passwd hit the return ligatures two times new password on the line, pay attention to the complexity of the degree of Command command

Both the exit and _EXIT functions are used to terminate the process. When the program executes to exit or _exit, the system stops all remaining operations unconditionally, clears various data structures including PCB, and terminates the operation of

Interprocess communication must be provided through the kernel channel, and there must be a way to identify a channel provided by the kernel in the process, which is identified by an open file descriptor. If several processes to communicate with

First, in order to understand the signal, start from our most familiar with the scene: 1. User input command to start a foreground process under the shell. 2. The user presses the CTRL-C, this keyboard input produces a hardware interrupt. 3. If

First, the concept of the terminal In the UNIX system, the user obtains a shell process through the terminal login system, this terminal becomes the Shell Process Control terminal (controlling Terminal), the control terminal is the information

First, zombie process When the child process exits, the kernel sends a SIGCHLD signal to the parent process, and the child process exits as an asynchronous event (the child process terminates at any time the parent process runs) When a child

Multiple files under the/proc file system provide system information that is not specific to a particular process, but can be used throughout the system-wide context. The files that you can use vary depending on your system configuration. Command

The following are some steps to help you set the date and time under Linux, and include a little ntpd time synchronization. The special reminder is that in the release version the limit is Red Hat series, including Fedora,centos,redflag,unbreakable

Introduction: This article discusses three main executable file formats under the Unix/linux platform: a.out (Assembler and link editor output assembler and link editor outputs), COFF (Common Object File format Common Object File format), ELF

Before introducing the System V shared memory knowledge, let's take a look at POSIX shared memory and series functions a little bit. Shared memory is simply a real area of physical memory that can be mapped to a process's address space using some

1.1 Linux device driver classification Linux device drivers occupy a large proportion of the Linux kernel source code, and the length of the source code is increasing, mainly the increase of the driver. During the continuous upgrade of Linux kernel,

For Linux master seemingly simple network configuration problem, perhaps to say why it is not easy, so there are still too many beginners wandering outside the door is not strange, Here, the old boy teacher spent some time summarizing this document

Recently lazy to do operation Dimension Automation, see the marketing department colleagues in the call public platform interface, feel very interesting ~ want to try this management simple management Linux host, and push alarm information. It is

Installation Environment and requirements: 1. System: RedHat AS4 (UPDATE2) 2. Package Requirements: cacti-0.8.6j,mysql-5.0.20,php-5.2.0,apache2.0.58 (all of the above are source packages). To install the configuration process: 1. Install apache2.

Here's how to use Message Queuing for interprocess communication, and Message Queuing has a lot in common with named pipes. For more information about named pipes, see my other article: Linux interprocess Communication--Using Named pipes First,