如果你和我一样经常需要在命令行里sudo,应该知道sudo的痛苦。。特别是密码比较长的时候，如果可以直接以root权限登陆terminal，一切限制都不存在鸟～另外还可以用root权限登陆到图形界面- –
方案1：修改root密码
sudo passwd，回车后输入两次想要给root的密码，done……
表打我。。
想要root的shell时候直接su，给密码，完事，exit返回正常
Mac:~ john$ sudo passwd
Password:
Changing password for root.
New password:
Retype new password:
Mac:~ john$ whoami
cxlyx
Mac:~ john$ su
Password:
sh-3.2# whoami
root
方案2：不修改root密码
需要root权限的terminal时候，sudo bash，回车，给自己当前用户密码，完事……唯一缺点就是不能启动root权限的图形界面
To be simple:
When you can’t boot into MacOSX in your mac computer, just Press and hold Apple key + s on you keyboard when powering on, you will get into a text based shell, there we can do some fix without use of Mac install CD.
First, we should know which disk need to run fsck_hfs.
Hint “fsck” and press enter, you will get a error message like:
fsck can’t run on /dev/rdisk0s2
The /dev/rdisk0s2 above is what we need for the following step, if you are installing macosx as default layout, it should be /dev/rdisk0s2
Ok, let’s roll.
Type command: fsck_hfs -fy /dev/rdisk0s2 and hint enter, after a few minutes, it should stop running, end with ***disk modified***
Then you should issue “reboot” command to reboot your mac, if it still doesn’t work, try the following:
fsck_hfs -fry /dev/rdisk0s2
Apple kb link here: http://developer.apple.com/library/mac/#DOCUMENTATION/Darwin/Reference/ManPages/man8/fsck_hfs.8.html
Good luck to you guys.
Following content is off topic and in Chinese, just ignore them if you r trying to fix your mac 😉
这篇文章本来不打算恢复的，某然间去Google WMT看到这篇文章有不少链，都来自apple的论坛，就这样404掉好像不太妥，于是手工凭印象恢复了……估计很快就能看到大量（~10ip/day）的访问了。。