export用于设置或显示环境变量。
使用方法
export TEST="test"
# TEST代表变量名,test代表变量值
export -n TEST
#-n参数代表一出TEST变量
参数:
- -f 代表[变量名称]中为函数名称。
- -n 删除指定的变量。变量实际上并未删除,只是不会输出到后续指令的执行环境中。
- -p 列出所有的 shell 赋予程序的环境变量。
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