CentOS use Xen virtual machine NTP time cannot sync problem

The local clock in the Xen Linux machine is by default (done) synchronized with the physical host clock, in order to change the time it uses the Sync Service for NTP, the kernel parameters must be set by the virtual machine:Shell CodeEcho 1

CentOS Modify DHCPD log is not logged in the system log

To edit a DHCP service configuration file Vim/etc/dhcp/dhcpd.conf added at the endLog-facility Local4;Edit Rsyslog service profile, modify/var/log/messages join Local4.none/var/log/messagesVim/etc/rsyslog.conf Join# Save DHCPD messages also to

CentOS 6.5 Example of a VPN environment (Digitalocean host)

Script The code is as follows Copy Code #!/bin/bash function Installvpn () {echo "Begin to install VPN services";#check Wether VPS Suppot PPP and TunYum Remove-y pptpd PPPIptables--flush postrouting--table

CentOS in the TAR command processing compression, decompression example

TarFormat: tar [options] [file directory list]Function: Package A backup of the file directoryOptions:-C to create a new archive file-R appending files to the end of the archive file-X Extract files from archive-O unlocking files to standard

Tutorial on using VirtualBox + Vagrant to install CentOS 7 on Windows

To use VirtualBox + Vagrant on Windows to install the CentOS 7 environment, you must install VirtualBox and Vagrant tools and download a box image file for CentOS 7.1. Install the above tools. After downloading the box file, run the vagrant command

CentOS openssl certificate issuing example

Step 1: first create a CA certificate,First, create an RSA private key for the CA,# Cd/etc/pki/CA# Openssl genrsa-des3-out ca. key 1024(Because ssl_module in windows does not support encryption keys, use openssl genrsa-out ca. key 1024)The system

Solution to the failure of resolve (resolution) for wget operations in CentOS

The result of wget operation on a VPS times out. The information is as follows:• Wget http://blog.is36.com/• -- 09:13:14 -- http://www.111cn.net• Resolving blog.is36.com... failed: Temporary failure in name resolution.• Wget: unable to resolve host

Upgrade wdcp to php5.3 in centos

Switch to the wdcp Directory (in fact, it can be any location, and I prefer to put it together)Cd/www/wdlinuxUpgrade to php5.3Wget http://down.wdlinux.cn/in/php_up53.shSh php_up53.shWget http://downinfo.myhostadmin.net/vps/pdo_mysql_ins5.3.shSh

CentOS 6.8 system installation and configuration graphic tutorial

Note:The latest version of CentOS 6.x is CentOS 6.8. The following describes how to install and configure CentOS 6.8.The server settings are as follows:Operating system: CentOS 6.8 64-bitIP address: 192.168.21.129Gateway: 192.168.21.2DNS: 8.8.8.8 8.4

Solve the problem that CentOS cannot be updated after replacing AliCloud yum source

Today, when I helped a friend mount a data disk to an Alibaba Cloud ECS server and install the LNMP environment, screen is not installed by default, so I started to install yum directly and found that there is no data source, therefore, no source is

Linux (centos) Imagemagick upgrade script

In May 3, the image processing software ImageMagick was released a serious 0-day vulnerability (CVE-2016-3714) through which attackers can execute arbitrary commands and finally steal important information to gain control of the server.For more

CentOS 7.1 install Zabbix2.5 (Zabbix3.0 Alpha version) tutorial

Installation environmentSystem: CentOS7.1Apache: 2.4.6MySQL: 5.6.26PHP: 5.6.12Before Zabbix installationObtain Zabbix2.5 source code# Cd/tmp# Wget 'http: // response'# Tar-zxvf zabbix-2.5.0.tar.gzAdd zabbix user# Groupadd zabbix# Useradd-g

Example of how to compile and install nodejs in centos

Today, let's talk about how to compile and install nodejs separately. If so, let's take a look at the end. If not, let's install nodejs step by step.System: centos 6.x( 64-bit)Software version: nodejs 5.3.01. Upgrade gcc firstFor more information

Detailed steps for installing the monitoring tool monit on CentOS 7

During server O & M, we usually use Zabbix for monitoring. Here we install and configure monit. When the process is detected to be stopped, the process can be automatically started.We recommend that you use the rpmforge source to install monit,

How to install php5.6 in CentOS 7.0 yum

After php5.6 is installed, you no longer need to install Zend Guard. Instead, you can use the yum command to install php-opcache and php-pecl-apcu, which can effectively improve the php execution speed.1. Configure the yum sourceCheck whether the

Install the use of Let's Encrypt SSL certificate for the website on CentOS 7

Install the Let's Encrypt clientFor the CentOS release, there are currently two ways to install the Let's Encrypt client, one is to directly install yum from the upstream EPEL source, one is to download from the GitHub source of Let's Encrypt. The

How to enable automatic and scheduled restart of crontab in centos

For example, set the restart method at every day:After successfully logging on to the server using the SSH tool, run the following command:Crontab-ePress the Insert key to enter the editing mode.Then, enter:0 5 ***/sbin/reboot(Pay attention to

Centos 6.4 64-bit compilation and installation of mysql5.6 steps

Direct-to-topic: dependency installationInstallation environment: centos 6.4 x86_64Install the c ++ compiling environment:Yum install gcc-c ++ ncurses-develBision:Cd/usr/local/srcWget http://ftp.gnu.org/gnu/bison/bison-2.7.1.tar.gzTar-zxf bison-2.7.1

How to install vmtools in CentOS 7 under VMware

Many problems have occurred before the installation, mainly due to Kernel version issues (the specific situation is probably that the Kernel Header cannot be found ). This time I went through the process again and found that the problem was solved.

Steps for building a vpn pptp server under RHEL/Centos/Fedora/

 Vpn has been used for many years. However, due to laziness, I have never written any articles about how to build a vpn server. This year I am interested in this. I would like to share with you the process of building a vpn server, it is easy to

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