Linux

In Linux, common users cannot bind ports lower than 1024, but there are always some special situations. For example, the most common user program needs to listen to port 80, which can be implemented in many ways, previously, sudo was often used to

One of the most powerful features of Linux is that it has a large number of small command tools, which can be called the most interesting part of it. Among these many useful commands and scripts, you will find that a few sub-command tools are not so

I use CentOS6.5 for Linux. So take CentOS as an example: First, Log On As a super administrator for convenience. [Bkjia @ bkjia ~] $ SuPassword:[Root @ bkjia] # Go to the/etc/sysconfig directory and check if there is any firewall "iptables" [Root @

After editing files in the/proc directory using Vim, save the file and display "synchronization failed in E667 ". Cause analysis: Because the proc directory is a virtual file system, the data stored in it is in the memory and does not occupy the

1. Prepare the installation package 1. Go to the official website to download adt-bundle-linux and Android-ndk. My environment is ubuntu64bit, so the version I downloaded is: (1)adt-bundle-linux-x86_64-20131030.zip Android-ndk-r9b-linux-x86_64

Environment: VMware Workstaion 9 Synchronization method; Step 1: (enable the synchronization feature of VMware) Select the host to be synchronized, right-click "setting" --> "Options", and select "Vmware Tools" to check the time synchronization

First, let's take a look at buffer and cache:Buffer, to solve the disk write efficiency;Cache to improve Disk Read efficiency. In Linux, data is first placed in a buffer to improve the efficiency of disk reading and writing.Writing data to a disk

The ln command is used to create a link for an archive. 1. Use the ln command to create a symbolic link for the file.The symbolic link in linux is similar to the shortcut in windows.Run the ls command to check whether the newly created symbolic link

CentOS IP Address Setting Method 1. Use commands to configure network information Ifconfig eth0 192.168.1.33 netmask 255.255.255.0 upRoute add/del default gw 192.168.1.1Note: The above configuration will not be restarted. If you want to save it

After opening Ubuntu, the following page appears: The selected modes do not match the possible modes:CRTC 63 Trial ModeCRTC 63: Try 800x600 @ 60Hz mode output at 1366x768 @ 60Hz (through 0)CRTC 63: Try 2560x1600 @ 60Hz mode output at 1366x768 @

CentOS 6.4 system kernel upgrade 1. view the kernel version of the existing system[Root @ localhost ~] # Uname-Linux localhost. localdomain 2.6.32-358. el6.i686 #1 SMP Thu Feb 21 21:50:49 UTC 2013 i686 i686 i386 GNU/Linux[Root @ localhost ~] # 2.

Kamailio (formerly OpenSER) is an open-source SIP server project based on GPL authorization. It can process thousands of concurrent calls per second. Its official homepage is http://www.kamailio.org. This document describes how to install and

1. Introduction This software package can install and update lua's third-party modules.   2, Select the required software package on the http://luarocks.org/releases/ page. Wget http://luarocks.org/releases/luarocks-2.1.0.tar.gz   3.

First, find the same CentOS system and copy the/etc/profile file to the/etc directory of the faulty system, Then run the following command: # Source/etc/profile In this way, it is restored. If the newly installed system runs commands such as

If you are a server administrator, you may know that you want to protect your server, not only from the outside, but also from the inside. Linux has a built-in tool to view the users who finally log on to the server, which can help you protect the

When I first came to the company, the company's C program was still 32-bit. Later, I read some documents and thought that 64-bit programs are the real trend, so I started to develop 64-bit programs. This article describes how to build a 64-bit C

The following error occurs when yum is used in linux today: Loaded plugins: fastestmirror, security Existing lock/var/run/yum. pid: another copy is runing as pid 4733. Another app is currently holding the yum lock; waiting for it to exit... The

Try FreeBSD10.0 Release and find that the installation of Intel integrated graphics card is different from FreeBSD9.0. The main error is: unknown type name GLDEBUGPROCARB. The process is as follows: 1. Upgrade ports trees Through portsnap. Use the

I am going back to Java programming recently, so I plan to configure JDEE on the latest version of Emacs 24.3. I have heard that there will be some problems. I hereby record the installation process. Emacs 24.3 built-in CEDET, version is 2.0, This

Step 1: update the system. Enter the following command on the terminal: Sudo app-get update # update source listSudo app-get upgrade # Update installed packagesSudo app-get dist-upgrade # update software and upgrade the system Step 2: install