求助!/etc/passwd文件丢失或损坏,如何解决

youngplayer

求助,/etc/passwd文件丢失或损坏,如何解决

东方蜘蛛

为什么会丢失或损坏，除非人为瞎搞
这些重要的系统文件建议修改之前一定要做好backup！

yuhuohu

惨，二楼的大仙不知道偶更不知道

东方蜘蛛

没有做备份那也没有办法了，如果除了系统用户没有什么其他用户就手动建立一个了，可以参考其他主机上的passwd文件！

semiwinter

遗忘ROOT口令
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作者:南非蜘蛛???zhedou@163.com

方法一:

1.别怕 ,跟我来.
2.把你的solaris光盘放进cdrom
3.键入stop+a
4.当出现'ok'字样时,键入boot cdrom -s
5.cd /tmp
6.mkdir /tmp/xxx (xxx是什么鬼东西就无关紧要了)
7.mount /dev/dsk/c0t0d0s0 /tmp/xxx (在这里c0t0d0s0是你的root盘)
8.运行csh
9.TERM=sun;export TERM或者
setenv TERM vt220
10.cp /tmp/root/xxx/shadow /tmp/root/xxx/shadow/shadow.backup
11.vi /tmp/root/xxx/shadow并且将password里root项删除。
12.重启动，你就可以以无密码的root登陆了，这时更改你的密码。


要是没有shadow,就把/etc/passwd里root用户名后面的X删掉,就可以了

方法二:

找一台有系统的solaris机器,把忘记密码的系统放进去mount上来,重复方法一10以后的步骤.


道理一样，更改root的/etc/password的shell。。

youngplayer

我参考了其他主机的passwd和shadow,将故障机完全恢复到和正常机器一样,但是在启动的时候仍然报如下错误:
syslog service starting.
! No such user as adm - cron entries not created 三 12月  6 13:58:42 2006
! No such user as root - cron entries not created 三 12月  6 13:58:42 2006
! No such user as sys - cron entries not created 三 12月  6 13:58:42 2006
! No such user as lp - cron entries not created 三 12月  6 13:58:42 2006
! No such user as uucp - cron entries not created 三 12月  6 13:58:42 2006



The system is ready.
missing or bad passwd entry for <root>
missing or bad passwd entry for <root>
missing or bad passwd entry for <root>
missing or bad passwd entry for <root>
missing or bad passwd entry for <root>
missing or bad passwd entry for <root>
missing or bad passwd entry for <root>
missing or bad passwd entry for <root>
missing or bad passwd entry for <root>
missing or bad passwd entry for <root>

还会是什么原因呢?

Philmoon

原帖由 youngplayer 于 2006-12-6 16:36 发表
我参考了其他主机的passwd和shadow,将故障机完全恢复到和正常机器一样,但是...

主要要恢复用户名称、UID、GID等，shadow里的加密口令不能简单复制，还是清空之后重新设置才行。

briangao

The system should have automatically saved your orginal passwd file as /etc/opasswd. To recover your /etc/passwd file:

1. Boot from cd to single user mode: OK> boot cdrom -s
2. mount your root partition under /a such as mount /dev/dsk/c0t1d0s0 /a
3. cd /a/etc
4. cp -p opasswd  passwd
5. If you also need to restore shadow file, make a copy of the shadow file if exist, then cp -p oshadow shadow (depending on Solaris version, you may no may not have oshadow file)
6. Reboot your machine and login as root
7. If the user information in /etc/passwd file is more up-to-date then that is in /etc/shadow file, type command pwconv to sync the two files (caution: the command will erase the user entry from /etc/passwd file if it appears in /etc/shadow file but not in /etc/passwd file)