Linux

Function Description: adds a user account.Syntax: adduserNote: In Slackware, The adduser command is a script program, which obtains the input user account information through conversation, and then submits it to the useradd command of the real

Due to hardware, the root Standard Time of the machine is not equal to or greater, and the error of one month ranges from several seconds to several minutes. The time is not accurate for the server, which may cause a lot of trouble. For example, you

Prepare to learn about ORACLE. when setting up the environment, always prompt that SWAP space is insufficient. Specifically, record the method for adding SWAP space! To add a swap partition file in Linux, follow these steps: 1. Check the current

Centos software installation can be divided into two types: [Centos] rpm file installation, using the rpm Command similar to the [ubuntu] deb File Installation, using the dpkg Command [centos] yum installation similar to the [ubuntu] apt-get

Manage Ethernet connectionsNetwork interfaces use continuous identifiers such as eth0 and eth1.The network interface can be set to use an alias (aliases). The alias is marked as eth0: 1 and eth0: 2. This is called a network subinterface and is

I. Overview of inter-process communicationProcess Communication has the following purposes:A. Data Transmission: A process needs to send its data to another process. The data volume sent is between one byte and several Mb.B. Shared data: if multiple

1) Check the current zombie Process Information # Ps-ef | grep defunct | grep-v grep | wc-l 175 # Top | head-2 Top-15:05:54 up 97 days, 4 users, load average: 0.66, 0.45, 0.39 Tasks: 829 total, 1 running, 479 sleeping, 174 stopped, 175 zombie #

Root @ sample ~] # Adsl-setup timeoutWelcome to the ADSL client setup. First, I will run some checks onYour system to make sure the PPPoE client is installed properly...LOGIN NAMEEnter your Login Name (default root): Enter the username of the ADSL

We plan to record the process of configuring a series of servers under Centos. Here, we start from CentOS 6.3 configuring the local yum source. As we have introduced a lot of blog posts about local YUM sources before, we may just give a brief

There are many commands that can view files. Different commands have different advantages. You can select commands for different needs to improve efficiency:Cat displays content starting with the first line and outputs all contentTac displays the

Introduction: centos generally has an iptables firewall. Because the vps of the centos System in hyper-v architecture adopts the IPTABLES setting method widely circulated on the Internet, port 22 of ssh cannot be modified, if you modify the ssh port,

Less Function Description: less is similar to more, but less can be used to browse files at will, while more can only move forward, but cannot move backward, and less will not load the entire file before viewing. When using less, you can use the

In my system text mode, the default resolution is 800*600. When I use lynx to browse the webpage, I feel that the font is too large. If I want to adjust the resolution in this mode, I will go to google, the discovery is actually very simple. Go to

For system administrators or programmers, grep is probably the most popular tool when they need to search for specific text or patterns in a directory with complex configurations or in a large source code tree. If grep is one of your favorite tools,

When I log on to the server through ssh, frequent delays may occur. When I log on to the firewall, I find that the external network port of the firewall has reached 800 M/s. After checking, I find that the traffic on one server is very high. The

For Linux user operation records, the command history is generally used to view historical records. However, if important data is deleted due to misoperations, The history command will not be useful. So how should we implement the historical

Note:Environment: VMware workstationSystem: centos6.2The following operations are performed under root 1. USB flash disk mounting Mkdir/mnt/usb // create a directory for attaching a usb flash driveFdisk-l // view the USB flash drive mounted in the

By default, the installation is minimized, or, as required, the desktop is not installed when the system is installed. Now, the desktop environment is installed. Centos6 is used as an example. It is slightly different. For other systems, see

1. mount commandMount [-parameter] [device name] [mount point] Mount [-parameter] [device name] [mount point] 2. Uninstall command Umount [device name] Umount [device name] 3. view disk usage Df [-parameter] For example:Df-l Df-h Df

Recently, the system was found to be very slow, so we were preparing to change the domestic yum source. Prepare, first back up/etc/yum. repos. d/CentOS-Base.repoCd/etc/yum. repos. d/ Wgethttp: // mirrors.163.com/.help/CentOS6-Base-163.repo Change