I’m new to Docker, and it’s unclear how to access an external database from a container. Is the best way to hard-code in the connection string? # Dockerfile ENV DATABASE_URL amazon:rds/connection?string 16 s 16 You can pass environment variables to your containers with the -e flag. An example from a startup script: sudo docker run … Read more
How can I get the client IP address using PHP? I want to keep record of the user who logged into my website through his/her IP address. 2 29 Whatever you do, make sure not to trust data sent from the client. $_SERVER[‘REMOTE_ADDR’] contains the real IP address of the connecting party. That is the … Read more
Is there a way to read environment variables in Node.js code? Like for example Python’s os.environ[‘HOME’]. 8 process.env.ENV_VARIABLE Where ENV_VARIABLE is the name of the variable you wish to access. See Node.js docs for process.env.
Before installing gnuplot, I set the environment variable GNUPLOT_DRIVER_DIR = /home/gnuplot/build/src. During the installation, something went wrong. I want to remove the GNUPLOT_DRIVER_DIR environment variable. How can I achieve it? 5 unset is the command you’re looking for. unset GNUPLOT_DRIVER_DIR
I am experiencing an error while trying to compile Java programs. I am on Windows (this is a Windows-specific problem) and I have the latest JDK installed. I have attempted a solution involving the PATH variable, but the error persists. Console output: C:\>set path=C:Program Files (x86)\Java\jdk1.7.0\bin C:\>javac Hello.java ‘javac’ is not recognized as an internal or external … Read more
How do I get the value of an environment variable in Python? 1 15
(Is it because this is Java and therefore I shouldn’t be doing evil nonportable obsolete things like touching my environment?) I think you’ve hit the nail on the head. A possible way to ease the burden would be to factor out a method void setUpEnvironment(ProcessBuilder builder) { Map<String, String> env = builder.environment(); // blah blah … Read more
I am on JDK 8u25 on Windows 8, and I am experiencing a problem with my Java installation. I can run javac perfectly fine, but running java produces this error message: The system cannot find the file C:\ProgramData\Oracle\Java\javapath\java.exe How do I fix this? I think the problem has to do with my environment variables. The … Read more
