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linux中创建软链接源文件要写绝对路径,而硬链接没有此要求
不改名创建 ln -s $(pwd)/test.txt /tmp
ln -s $(pwd)/test.txt /tmp
改名创建 ln -s $(pwd)/test.txt /tmp/test.soft.txt
ln -s $(pwd)/test.txt /tmp/test.soft.txt
$(命令) 可以用来取命令的输出结果,作为命令行的一部分
chown -R $(whoami)
cd $(which node)/../