Centos time synchronization problems

In general, the synchronization time is required for enterprises. For windows domains, You can automatically synchronize the domain controller time. For CentOS system time synchronization, follow these steps: the newly installed CentOS system server

After VPS space, centos and reboot, ssh cannot be connected. solution.

vps

The space service provider's backend management includes the following: Console AccessLish via AjaxtermLaunch Lish Ajax Console» After the terminal is opened, it is the terminal: [Root @ sample ~] #/Etc/rc. d/init. d/sshd

Install VirtualBox enhancement in CentOS 6 and allocate Data Space

First, use the root user to log on, or obtain the root permission in the terminal. Then install the gcc compiler. By default, the gcc compiler is not installed in CentOS. If it is already installed, ignore this step. # Yum install gcc Install the

Error message configure: error: ZLib not installed when installing libpng in Centos 6.2

Centos 6.2 installation libpng error message configure: error: ZLib not installed When compiling libpng-1.5.8.tar.gz, an error is reported. configure: error: ZLib not installed. I used the following package for compilation. Zlib-1.2.6.tar.gz libpng-1

Solution: The centos website server cannot upload files larger than 2 MB

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:

CentOS synchronization time prompt "the NTP socket is in use" SOLUTION

If "the NTP socket is in use, exiting" is displayed when ntpdate is used for synchronization, you can solve the problem as follows. 1. Disable ntpdate first Service ntpdate stop 2. Execute time synchronization again Ntpdate us.pool.ntp.org

After CentOS is installed and restarted, it cannot enter the graphic interface. Solution

I have encountered problems as shown in the question before, but due to laziness and neglect, I have seen a good guide post today, which will be handed over for reference when my head is short-circuited. Previously, I only used the second method

Centos-network startup error RTNETLINK answers: File exists Solution

It is best to connect to the console instead of using SSH, because the network may be interrupted and you will not be able to connect to the machine.Chkconfig -- level 35 network onChkconfig -- level 0123456 NetworkManager off Service NetworkManager

CentOS x86_64 Yum does not update 32bit package solution

CentOS 64-bit version. By default, the 32-bit software package is upgraded and installed. As a result, some software uses a 32-bit software package in the 64-bit (x86_x64) Environment, resulting in an error during compilation, how can we prevent the

CentOS gateway binding ARP tutorial

1. view the current Gateway Arp- Run the preceding commands in SSH to check the gateway host name, gateway IP address, Gateway MAC address, and corresponding Nic, as shown in figure 2. Bind a gateway MAC 1) Bind Echo "198.52.103.193 00: D0

Detailed introduction to Centos Log Analysis

1. Understand log filesLinux Log files are the most useful. Log Files let us know the status of the system. For example, you can find out which users have logged on, which also involves related security issues. If we do not know how to analyze logs,

Problems related to connection failure after the ssh connection to centos is automatically disconnected

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

How to mount the second hard disk in Centos

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

What is the difference between Centos and Ubuntu?

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

Solve the slow startup of sendmail and sm-client in CentOS

Starting sendmail: Starting sm-client: After I posted an article about modifying the host name, I accidentally found that when CentOS was restarted, the system would be stuck in sendmail and sm-client for nearly three minutes, I found the sendmail

When a Centos user is deleted, the message "userdel: user ** is currently logged in" is displayed.

When I deleted my user account today, I found a strange phenomenon: Userdel: user newnameis currently logged in Solution: Mv/var/run/utmp/var/run/utmp_touch>/var/run/utmp The restart machine takes effect. Use userdel-r aa directly

How to reinstall grub in Centos

If centos is installed first and then win is installed in the dual-system, there will be no problems at startup. However, if the order is reversed or the dual-system is completed and win is re-installed, the MBR will be overwritten, in this way,

The CentOS is stuck in the progress bar. How can this problem be solved?

Centos is installed on the virtual machine. It works normally every night after it is started. I use poweroff before going to bed. But when it is started this evening, the progress bar will remain stuck after it is full. Is there a solution? Can I

An error is reported when the apache port cannot be restarted when it is modified in centos.

In centos, apache uses the default port 80. Now we want to change the port to 9191, for example, an error will be reported, The error message is as follows: (13) Permissiondenied: make_sock: couldnotbindtoaddress [:]: 9191(13) Permissiondenied:

Network faults caused by CentOS backup ifcfg-eth * files

We all know that the files under/etc/sysconfig/network-scripts/ifcfg-eth * are used to describe network settings in LINUX. However, you may not know that, due to ifup and other scripts, copying an ifcfg-eth * file to another file may cause some

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