我想按照以下的思路做一件事:
echo "Append string" >> protected_file
但是,由于此文件被写入保护, 我有一个错误。 运行中 :
sudo echo "Append string" >> protected_file
似乎在回声命令上运行 sudo, 而且仍然给我权限错误, 我该如何附加到此文件?
我想按照以下的思路做一件事:
echo "Append string" >> protected_file
但是,由于此文件被写入保护, 我有一个错误。 运行中 :
sudo echo "Append string" >> protected_file
似乎在回声命令上运行 sudo, 而且仍然给我权限错误, 我该如何附加到此文件?
echo "Append string" | sudo tee -a protected_file >/dev/null
对于一个字面的回答,
sudo sh -c echo "Append string" >> protected_file
但我原则上同意希万·拉普托的意见。
解释 : sudo 命令
, 您将不会运行另一个 shell; 因此, 您无法重新定向 > echo
, 而不同时重定向 sudo
(这最终使您在进行重定向时使用错误的用户代号 ) 。 关键在于在 sudo
内发射一个单独的外壳, 在那里您可以发布重定向操作符 。
或尝试此 :
echo "echo append string >> protected_file" | sudo bash
综合起来,确定一个答案,有三种方式:
sudo su root -c "echo append string > protected_file"
echo "echo append string >> protected_file" | sudo bash
echo "append string" | sudo tee -a protected_file >/dev/null
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