If you set LD_PRELOAD to the path of a shared object, that file will be loaded before any other library (including the C runtime, libc.so). So to run ls with your special malloc() implementation, do this: $ LD_PRELOAD=/path/to/my/malloc.so /bin/ls
Is there any way to access to the $VAR by just executing export.bash without sourcing it ? Quick answer: No. But there are several possible workarounds. The most obvious one, which you’ve already mentioned, is to use source or . to execute the script in the context of the calling shell: $ cat set-vars1.sh export … Read more
You know what has worked for me really well on windows. My Computer > Properties > Advanced System Settings > Environment Variables > Just add the path as C:\Python27 (or wherever you installed python) OR Then under system variables I create a new Variable called PythonPath. In this variable I have C:\Python27\Lib;C:\Python27\DLLs;C:\Python27\Lib\lib-tk;C:\other-folders-on-the-path This is the … Read more
FOO=bar bash -c ‘somecommand someargs | somecommand2’
Environment variables (in this case) are being used to pass credentials to your application. USER_ID and USER_KEY can both be accessed from process.env.USER_ID and process.env.USER_KEY respectively. You don’t need to edit them, just access their contents. It looks like they are simply giving you the choice between loading your USER_ID and USER_KEY from either process.env … Read more
First you need to export HTTP_PROXY. Second, you need to read man sudo, and look at the -E flag. This works: $ export HTTP_PROXY=foof $ sudo -E bash -c ‘echo $HTTP_PROXY’ Here is the quote from the man page: -E, –preserve-env Indicates to the security policy that the user wishes to preserve their existing environment … Read more
First, one thing to recognize about OS X is that it is built on Unix. This is where the .bash_profile comes in. When you start the Terminal app in OS X you get a bash shell by default. The bash shell comes from Unix and when it loads it runs the .bash_profile script. You can … Read more
The space before the = is interpreted as part of the name, and the space after it (as well as the quotation marks) are interpreted as part of the value. So the variable you’ve created can be referenced with %location %. If that’s not what you want, remove the extra space(s) in the definition.
Have you correctly set your PATH to point at your Git installation? You need to add the following paths to PATH: C:\Program Files\Git\bin\ C:\Program Files\Git\cmd\ And check that these paths are correct – you may have Git installed on a different drive, or under Program Files (x86). Correct the paths if necessary. Modifying PATH on … Read more
On Windows 7/8/10, you can install Chocolatey, which has a script for this built-in. After installing Chocolatey, just type refreshenv.