Shell Foundation Part3

Shell Basics

Introduction to environment variable configuration file

1, the role of the source command is to force the environment variable configuration file, the format is: the source environment variable configuration file or. environment variable configuration file

2. The environment variable configuration file is mainly defined as the system default environment variable which is effective for the system operating environment. such as Path history PS1.

3, environment variable configuration file path:/ETC/PROFILE;/ETC/PROFILED/*.SH;/ETC/.BASHRC; user home directory under/.BASHRC; user home directory/.bashrc_profile.

Second, the role of environment variable configuration file

1, the environment variable configuration file read process

　　

2. The role of the/etc/profil file ~/.bash_profile role of the ~/.BASHRC role of the/ETC/BASHRC file

　　

Shell Foundation Part3