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Efficiently test if a port is open on Linux?
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You can use netstat this way for much faster results:
On Linux:
netstat -lnt | awk '$6 == "LISTEN" && $4 ~ /\.445$/'
On Mac:
netstat -anp tcp | awk '$6 == "LISTEN" && $4 ~ /\.445$/'
This will output a list of processes listening on the port (445 in this exampl...
How can I symlink a file in Linux? [closed]
I want to make a symbolic link in Linux. I have written this Bash command where the first path is the folder I want link into and the second path is the compiled source.
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Where is the php.ini file on a Linux/CentOS PC? [duplicate]
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In your terminal/console (only Linux, in windows you need Putty)
ssh user@ip
php -i | grep "Loaded Configuration File"
And it will show you something like this Loaded Configuration File => /etc/php.ini.
ALTERNATIVE METHOD
You can make a php file on...
Virtual Serial Port for Linux
I need to test a serial port application on Linux, however, my test machine only has one serial port.
8 Answers
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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...
JavaFX and OpenJDK
...hich has JavaFX integrated these days. However, some are using OpenJDK (on linux). This (old) question suggests that OpenJDK deals very badly with JavaFX. According to this question, the alternative OpenJFX will only be fully integrated into OpenJDK in version 9. So my question is twofold:
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What is a classpath and how do I set it?
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In python there's a folder called Lib where you can store any module to use at any time with a simple import statement. Is this different than setting the CLASSPATH environment variable to a directory for third-party java packag...
Increasing the maximum number of TCP/IP connections in Linux
...anner for large periods of "activity."
Default Sysctl values on a typical Linux box for tcp_tw_recycle & tcp_tw_reuse would be
net.ipv4.tcp_tw_recycle=0
net.ipv4.tcp_tw_reuse=0
These do not allow a connection from a "used" socket (in wait state) and force the sockets to last the complete tim...
Cannot install packages using node package manager in Ubuntu
...ln -s /usr/bin/nodejs /usr/bin/node
alias node=nodejs
rm -r /usr/local/lib/python2.7/dist-packages/localstack/node_modules
npm install -g npm@latest || sudo npm install -g npm@latest
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How to copy to clipboard in Vim?
...o I use * because it functions as I expect it to in both environments.
In Linux distros you have to install vim-gtk (aka gvim) first to gain clipboard functionality. This is because non-gtk vim is typically compiled without X11 support. This is to allow it to run on console only machines (often ser...