/tmp 上的文件权限是什么?有没有可能改了?

What's are the file permissions on /tmp? Is it possible that they've been changed?

A

# ls -ld /tmp

会告诉你.

如果您不确定，请尝试:

If you're unsure try:

# chown root:root /tmp
# chmod 1777 /tmp

那可能会解决它.