"给所有文件最高权限，问题总能解决"——这大概是Linux新手最容易踩的坑。就像给自家大门配了把全小区通用的钥匙，你以为方便了自己，其实连路过的野猫都能推门而入。去年某云服务商因管理员误设777权限，导致300万用户数据被爬虫横扫，事后工程师在日志 ...

copy a chmod binary from a similar system to root's home dir and run that. I think you could probably even compile it from the source (probably in http://www.gnu.org ...

ITworld.com – If you have tried to give away any files lately on any of your Unix systems (i.e., without first becoming root), you may have been surprised to learn that you can’t. On most Unix systems ...