我在centos上，我做到sudo echo 'testline'>>/etc/test/test了说-bash: /etc/test/test: Permission denied
sudo echo 'testline'>>/etc/test/test
-bash: /etc/test/test: Permission denied
但是，当我执行sudo vi /etc/test/test并插入testline并执行时:wq它写得很好，为什么会发生这种情况？
sudo vi /etc/test/test
testline
:wq
linux vi sudo file-permissions echo
echo ×1
file-permissions ×1
linux ×1
sudo ×1
vi ×1