สิ่งที่น่าทึ่งในชีวิต

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Get mac address from ip by arping

arping -D 172.19.0.3 -I eth1

linux ___tmpxxxx network card not found

Network interfaces named ___tmpxxxx when HWADDR is not specified Article ID: 36572 - Created on: Nov 18, 2009 2:46 PM - Last Modified: Dec 15, 2010 9:55 AM Issue Ethernet interface keeps changing into '__tmpxxxx'. When server is rebooted, interfaces are named as '__tmp' instead of ethx. Invalid network interface name after reboot Environment Red Hat Enterprise Linux 5.3 initscripts-8.45.25-1.el5-x86_64 Resolution To prevent this from occurring, the "HWADDR=" parameter should be used in /etc/sysconfig/network-scripts/ifcfg-ethx as follows: Ethernet Device DEVICE=ethx BOOTPROTO=static HWADDR=xx:xx:xx:xx ONBOOT=yes Root Cause What happens is: 1. initrd loads modules. Generally not network ones, unless you've specifically configured it to do so. 2. udev loads modules. It loads them in parallel. This means that if you have multiple network drivers in the machine, they will race against each other for device assignment. 3. when a network device is created, /lib/udev/rename_device is run to attempt to coerce the device name into whatever device name is mapped to that MAC address in the ifcfg files. Otherwise, you just get the order they happen to initialize in (which can change from boot to boot) 4. rest of boot runs (during which you can do other things) Due to the fact udev does not load modules sequentially (#2), you will get non-deterministic ethernet device ordering if you have multiple network drivers in the machine. It's inevitable. So, it is required to use HWADDR= in the ifcfg files to accomplish that mapping. You could also use udev rules directly (with NAME=).

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iptables

iptables -nL

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ซ่อม lcd liberta lxl-750m

อาการ
ไม่มีไฟจ่าย r .47 ไหม้

ic fan7601 แตก

C L55 474 แตก

TR FQPF 5N60C ซ๊อต

อะไหล่ทดแทน
FAN7601 => UC3842
L55 474 => 47nK63

ปัญหา
ไม่สามารถหา TR FQPF 5N60C หรือตัวแทนได้

ซ่อมไม่ได้

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CentOS + Asterisk + MySQL

When install Asterisk-addon to use MySQL realtime function you may found problem to enable mysql. You can solve it with:

#yum -y install mysql-devel

in asterisk-addon directory
#./configure --with-mysqlclient=/usr/sbin

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MySQL find duplicate reccords

This is show you when you want to find duplicate reccord on MySQL .

select address, count(impt_key) as count_impt
from table
group by impt_key
having count_impt > 1
order by count_impt;