Linux increases user environment variables

Linux and windows environment variables have similarities

• Environment variables are PATH
• There are system environment variables and user environment variables
• Usually only need to modify user environment variables

linux environment variable path:

• System environment variables: etc/profile
• User environment variables: ~/.bashrc

• View the current environment variables, the path is separated by:

eric@eric-PC:~$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/sbin:/usr/sbin:/usr/local/include/ImageMagick-7/:/usr/include/gtk-2.0/gtk/:/usr/local/mipsel-openwrt-linux-musl-gcc/bin

• Add user environment variables, append after ~/.bashrc

# arm linux gcc
export ARM_GCC_PATH=/usr/local/arm/arm-linux-gcc
export PATH=$PATH:$ARM_GCC_PATH/bin

• source ~/.bashrc to make the changes effective

eric@eric-PC:/$ source ~/.bashrc 
eric@eric-PC:/$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/sbin:/usr/sbin:/usr/local/include/ImageMagick-7/:/usr/include/gtk-2.0/gtk/:/usr/local/mipsel-openwrt-linux-musl-gcc/bin:/usr/local/arm/arm-linux-gcc/bin

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