Modify environment variable path path under Linux system

Method One:

Path= $PATH:/etc/apache/bin

This method is valid only for the current session, and each time you log off or take out the system, the setting is invalid

Method Two:

Vi/etc/profile

Write in the appropriate location: path= $PATH:/etc/apache/bin

$PATH is the default system environment variable path

/etc/apache/bin is the path to the environment variable that needs to be added

If/etc/profile is modified, then the source profile or the Execute Point command is executed after the edit finishes. The value of/profile,path will take effect immediately.

Method Three:

VI ~/.bash_profile

Modify the path line to add/etc/apache/bin

This approach is effective for users

To change path, you must re-login to take effect

The principle of this method is to execute the/etc/profile shell script again, note that if the use of sh/etc/profile is not possible, because SH is executed in the child shell process, even if the path changes will not be reflected in the current environment, but the source is in the current Shell process, so we can see the change in path.

Modify environment variable path path under Linux system