描述
在使用 Devstack 的时候需要时常切换用户su stack
,此时会触发错误:
root@mickeyfan-dev:~# su stack
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
bash: /dev/null: Permission denied
一般而言,Permission denied 问题可以通过 reset 权限 chmod 666 /dev/null
来解决,但在 Ubuntu 中,系统会自动将设备的权限还原为 420 crw--w---- 1 root tty 1,3 Aug 26 11:46 /dev/null
。所以常用的方法并不能解决该问题。
解决方案
-bash: /dev/null: Permission denied
rm -f /dev/null; mknod -m 666 /dev/null c 1 3
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