Linux environment variable Configuration

configuration file and execution order:

1>/etc/profile, System level, will call/ETC/BASH.BASHRC

2>/etc/enviroment, System level, setting system-level environment variables

3> ~/.profile, user-level

4> ~/.BASHRC, User level

5> ~/.bash_profile or ~./bash_login-if One of these file exist, bash executes it rather then ' ~/.profile ' when it is s tarted as a login shell. (Bash would prefer "~/.bash_profile" to "~/.bash_login"). However, these files won ' t influence a graphical session by default.

Configuration method:

Export path= "$PATH:/my_new_path"

The Java environment switches from Openjava to Oracl Java, in addition to setting environment variables, you need to do the following:

1> marking a new Java environment

sudo update-alternatives--install/usr/bin/java java $JAVA _home/bin/java 300

sudo update-alternatives--install/usr/bin/javac javac $JAVA _home/bin/javac 300

2> Select the ID of 300

sudo update-alternatives--config java

sudo update-alternatives--config JavaC

Linux environment variable Configuration