Vmvm bridging network under centos
The bridging network under the vmvm is equivalent to a virtual machine that is an independent host and directly connected to the Internet. This is a good connection method, so that the external
An old PHP backend server was checked with free-m today and found that the memory was full.Next, press SHIFT + M, that is, sort by memory usage percentage, and find that the process ranked first occupies 0.9%. What is the occupation? Google caches
These days are always plagued by a problem, that is, base64 encryption, which cannot be decrypted on the centos server. After repeated tests, it was found that the centos system did not have the gb2312 database.
The encryption end is processed in
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Centos Nic configuration Summary
After downloading and installing centos6.5 and customizing the web server type, we started our centos journey. Why do we give up ubuntu? The reason is
Apache + mysql + php that has been installed and can be used normally.Download the current Pre-BuiltPackages for Stable version (http://nginx.org) for CentOS from the official nginx website
The netstat command displays network connection, route table, and network interface information, allowing you to know which network connections are in operation. In our daily work, we usually use two parameters, netstat-an, as shown below:
[Root @
I recently read "Practical Linux Shell programming and Server Management" and practiced it. When I saw sed and awk, I felt that these two tools were really useful. After learning to use it, I want to see the system information at ordinary times. I
Solution[Root @ 2193 etc] # vi php. ini
; Maximum allowed size for uploaded files.Upload_max_filesize = 10 M
; Maximum size of POST data that PHP will accept.Post_max_size = 15 M
[Root @ 2193 etc] #/etc/rc. d/init. d/httpd restartStop httpd:
Environment Description:
Server A has dual NICs and installs the operating system RHEL6.3
----------------------------------------------------------
Nic display name IP address Gateway
----------------------------------------------------------
Eth0 1
Recently, the company's testing machine is a little crazy. The situation is as follows: it is normal to use after logging in with SSH, but another computer
You are also logged on. At this time, all connections will be disconnected, and you will not
1. Check whether the hard disk can be identified
# Fdisk-lDisk/dev/sda: 36.7 GB, 36703934464 bytes255 heads, 63 sectors/track, 4462 cylindersUnits = cylinders of 16065*512 = 8225280 bytes Device Boot Start End Blocks Id System/dev/sda1 * 1 261 209645
CentOS (Community ENTerprise Operating System) is one of the Linux releases. It is compiled from the source code that Red Hat Enterprise Linux releases according to open source code regulations. Because of the same source code, some servers that
In Linux, use a new hard disk to install the system. After the system is installed, mount the original hard disk. The partition format is all the default partitions of the system.It is in lvm format, and the default volume is VolGroup00.
Use pvs to
Very strange ~ CentOSx86_64: init 3 modeYou can log on remotely through SSH, but the monitor cannot directly connect to the keyboard.Entering the correct account and password on the logon page will return to the logon page again without any
Everything went smoothly when phpmyadmin was installed today. When logging on, I am prompted that the mcrypt extension cannot be loaded. Check the PHP configuration. After thinking about it, I didn't seem to add -- with-mcrypt when compiling php.
Today, a friend has a problem with the server hard disk. After a new hard disk is installed and the system is installed, the problem occurs when the old hard disk is mounted,In linux, use a new hard disk to install the system. After the system is
This problem occurs twice. centos6.4 was used once a year ago, and centos6.5 was recently used. The reason should not be accidental, but I do not know how this problem occurs for the moment...
When centos is installed for the first time, the page
Very strange ~ The server is CentOS x86_64 boot pole: init 3 modeYou can log on remotely through SSH, but the monitor cannot directly connect to the keyboard.Entering the correct account and password on the logon page will return to the logon page
The read command is used to read text from the keyboard or standard input. Read user input in interactive form. The "Enter key" is used as the end by default.
It is generally used in automated sh scripts.
# Use non-echo (non-echoed) to read the
First, make sure you can ping
Run the following command,
Master login slave
Run the following command on the master:
2.4 check the local sshd configuration file (root)
$ Vi/etc/ssh/sshd_config
Find the following content and remove the
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