[root@localhost test]# export AUTHOR=brady
[root@localhost test]# echo $AUTHOR
brady
[root@localhost test]# env

[root@localhost test]# echo $PATH
/usr/local/miniconda/condabin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/opt/puppetlabs/bin:/root/bin
[root@localhost test]# 
linux 默认可执行文件查找目录

[root@localhost test]# PATH="$PATH":/root
[root@localhost test]# echo $PATH
/usr/local/miniconda/condabin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/opt/puppetlabs/bin:/root/bin:/root
[root@localhost test]# 

临时生效

vim /etc/profile
export PATH="$PATH":/root