Mac Os X Set Java.library.path

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(MS Windows) How to Load a Java Native/Dynamic Library (DLL) There are several ways to make it possible for the Java runtime to find and load a dynamic library (DLL) at runtime. Dec 12, 2016  From the Finder of Mac OS, pull down the 'Go' menu and hold down the SHIFT key Choose 'Library' from the drop down list You can also hit Command+Shift+L from the MacOS Finder to immediately jump to the /Library directory of the active user account. Therefore, as long as you don't move the executables or libraries to different relative directories, you should be able to just run the executables without doing anything special. If you are having problems, you should manually set LDLIBRARYPATH. Mac OS X Dynamic libraries on OS X have the concept of installname.

OR

Sample outputs:

OS X: Change your PATH environment variable

You can add path to any one of the following method:

1. $HOME/.bash_profile file using export syntax.
2. /etc/paths.d directory.

Method #1: $HOME/.bash_profile file

The syntax is as follows:

In this example, add /usr/local/sbin/modemZapp/ directory to $PATH variable. Edit the file $HOME/.bash_profile, enter:
vi $HOME/.bash_profile
OR
vi ~/.bash_profile
Append the following export command:

Save and close the file. To apply changes immedialty enter:
source $HOME/.bash_profile
OR
. $HOME/.bash_profile
Finally, verify your new path settings, enter:
echo $PATH
Sample outputs:

Method #2: /etc/paths.d directory

Apple recommends the path_helper tool to generate the PATH variable i.e. helper for constructing PATH environment variable. From the man page:

The path_helper utility reads the contents of the files in the directories /etc/paths.d and /etc/manpaths.d and appends their contents to the PATH and MANPATH environment variables respectively.

(The MANPATH environment variable will not be modified unless it is already set in the environment.)

Files in these directories should contain one path element per line.

Prior to reading these directories, default PATH and MANPATH values are obtained from the files /etc/paths and /etc/manpaths respectively.

To list existing path, enter:
ls -l /etc/paths.d/
Sample outputs:

You can use the cat command to see path settings in 40-XQuartz:
cat /etc/paths.d/40-XQuartz
Sample outputs:

To set /usr/local/sbin/modemZapp to $PATH, enter:

OR use vi text editor as follows to create /etc/paths.d/zmodemapp file:
sudo vi /etc/paths.d/zmodemapp
and append the following text:

Save and close the file. You need to reboot the system. Alternatively, you can close and reopen the Terminal app to see new $PATH changes.

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Conclusion

1. Use $HOME/.bash_profile file when you need to generate the PATH variable for a single user account.
2. Use /etc/paths.d/ directory via the path_helper tool to generate the PATH variable for all user accounts on the system. This method only works on OS X Leopard and higher.

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See also:

• Customize the bash shell environments from the Linux shell scripting wiki.
• Man pages – bash(1), path_helper(8)

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The shell path for a user in macOS or OSX is a set of locations in the filing system whereby the user has permissions to use certain applications, commands and programs without the need to specify the full path to that command or program in the Terminal. This will work in macOS Mojave, Sierra and all older OSX operating systems; El Capitan, Yosemite, Mavericks and Lion.

So instead of running something like this, with a path to the command:

You can just type the command, regardless of where you are in the filing system:

Your shell path is a bunch of absolute paths of the filing system separated by colons :

You can find out whats in your path by launching Terminal in Applications/Utilities and entering:

And the result should be like this…

So this is stating that you can run Unix style applications or commands located in 5 default locations of a certain path in the filing system:

• /usr/bin
• /bin
• /usr/sbin
• /sbin
• /usr/local/bin

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These directories are not visible by default in the filing system but you can make them visible.

Adding a Temporary Location

You can add extra locations to your path, in the mysql example above it's location /usr/local/mysql/bin which is not in the default path, you can add it in Terminal like so:

So here I have copied my existing path and added the new location on the end. Test it by running echo $PATH again in the Terminal.

One of the disadvantages of this is that the new location will only be honored for that particular Terminal session, when a new Terminal window is launched it will have the original default path again.

Adding in a Permanent Location

To make the new pathstick permanently you need to create a .bash_profile file in your home directory and set the path there. This file control various Terminal environment preferences including the path.

Move into home directory

Create the .bash_profile file with a command line editor called nano

Add in the above line which declares the new location /usr/local/mysql/bin as well as the original path declared as $PATH.

Save the file in nano by clicking ‘control' +'o' and confirming the name of the file is .bash_profile by hitting return. And the ‘control'+'x' to exit nano

So now when the Terminal is relaunched or a new window made and you check the the path by

You will get the new path at the front followed by the default path locations, all the time

Rearranging the default $PATH

If you needed to rearrange the paths in the default $PATH variable, you can just do that and leave off $PATH.

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So lets say you want /use/local/bin at the beginning to take precedence you can add the default path like so inside .bash_profile

And then you can slot in other paths as required.