[英]Switch to root user within bash script
Im currently logged in as admin and I want to edit the /etc/hosts file which required root access.我目前以管理员身份登录,我想编辑需要root访问权限的/etc/hosts文件。
I'm not able to make the changes.我无法进行更改。 The script gets executed sucessfully but the changes arent made.
脚本成功执行,但未进行更改。
My Script - Runs Sucessfully when executed from terminal我的脚本 - 从终端执行时成功运行
sudo -s
echo "127.0.0.1" >> /etc/hosts
su admin
sudo -s - switches to root without password when executed from terminal
sudo -s - 从终端执行时切换到没有密码的 root
su admin - switches back to admin user when run on terminal
su admin - 在终端上运行时切换回管理员用户
My /etc/hosts file remains empty after running the script运行脚本后,我的 /etc/hosts 文件保持为空
There is no need to actually switch your user within the script.无需在脚本中实际切换用户。
Also, you can't echo
something as root like that because the redirect ( >>
) is executed by the shell.此外,您不能像这样以 root 身份
echo
某些内容,因为重定向 ( >>
) 是由 shell 执行的。
A possible workaround is using tee
:一种可能的解决方法是使用
tee
:
echo "127.0.0.1" | sudo tee -a /etc/hosts
Further explanation:进一步解释:
tee
basically takes the data from the standard input and writes it either to the standard output, or to a file. tee
基本上从标准输入获取数据并将其写入标准输出或文件。 For more information see the commands manual ($ man tee
)有关更多信息,请参阅命令手册 ($
man tee
)
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