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如何使用sudo命令来添加内容到文件中
source link: https://www.lujun9972.win/blog/2017/06/04/%E5%A6%82%E4%BD%95%E4%BD%BF%E7%94%A8sudo%E5%91%BD%E4%BB%A4%E6%9D%A5%E6%B7%BB%E5%8A%A0%E5%86%85%E5%AE%B9%E5%88%B0%E6%96%87%E4%BB%B6%E4%B8%AD/index.html
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如何使用sudo命令来添加内容到文件中 - 暗无天日
如何使用sudo命令来添加内容到文件中
从https://www.cyberciti.biz/faq/sudo-append-data-text-to-file-on-linux-unix-macos/ 中看到的
当我们想往root所属文件中添加内容时,你可能会写出这样的语句
sudo echo '192.168.1.254 route' >> /etc/hosts
然而,这种写法是错误的,它的意思是执行sudo命令,然后将sudo命令的结果添加到/etc/hosts中.
所以,当你用非root用户执行上一语句时,会提示 bash: /etc/hosts: Permission denied.
正确的做法是为sudo命令使用tee命令或者shell本身:
使用tee命令
echo '192.168.1.254 router' | sudo tee -a /etc/hosts
使用shell本身
sudo sh -c 'echo "192.168.1.254 router" >> /etc/hosts'
2017-06-04
2017-06-04
linux和它的小伙伴
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