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How to fix apt-get: command not found on AWS EC2? [closed]
I installed Ubuntu 12.04 on my instance and am trying to install packages using apt-get, but I am getting the following error:
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Class 'DOMDocument' not found
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You need to install the DOM extension. You can do so on Debian / Ubuntu using:
sudo apt-get install php-dom
And on Centos / Fedora / Red Hat:
yum install php-xml
If you get conflicts between PHP packages, you could try to see if the specific PHP version package exists instead: e.g. php53...
如何抓住痛点做出让用户尖叫的产品 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的情况下，体验到产品的优化改进。比如在微信（iOS版，Android版没有试用，不是很确定，理论上体验是会一致的）中有这样一个功能，当你做了手机屏幕截图的操作后，打开微信的任一聊天窗口，选择“+”号发送其他内容时，...
Color picker utility (color pipette) in Ubuntu [closed]
I'am looking for a color picker utility on Ubuntu/Debian.
Anything simple and easy to use.
2 Answers
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How to detect the physical connected state of a network cable/connector?
...e using Process Runtime Exec commands to check if the cable is connecte in Android.
– Arlyn
Oct 24 '16 at 16:26
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CMake not able to find OpenSSL library
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I had the same problem (openssl) and this worked for me on Ubuntu 14.04.1 LTS. The solution is the same up to Ubuntu 18.04 (tested).
sudo apt-get install libssl-dev
share
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improve...
Installing Bower on Ubuntu
I'm trying to install Bower on XUbuntu 13.10, following the instructions on the Bower home page, after doing sudo apt-get install npm and sudo npm install -g bower I get the following after issuing bower on the command line:
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Core dumped, but core file is not in the current directory?
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On recent Ubuntu (12.04 in my case), it's possible for "Segmentation fault (core dumped)" to be printed, but no core file produced where you might expect one (for instance for a locally compiled program).
This can happen if you have a...
How to install the JDK on Ubuntu Linux
I am trying to install the Java Development Kit (JDK) on Ubuntu Linux distribution, but I am unable to install it.
33 A...
TCP 的那些事儿（上） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...大并发的短链接下，TIME_WAIT 就会太多，这也会消耗很多系统资源。只要搜一下，你就会发现，十有八九的处理方式都是教你设置两个参数，一个叫tcp_tw_reuse，另一个叫tcp_tw_recycle的参数，这两个参数默认值都是被关闭的，后者rec...