Linux采用救援模式恢复/etc/fatab文件。

本是古典何须时尚 2022-03-25 13:28 445阅读 0赞

挖坑经历：

需求：挂载Cdrom盘进入系统，修改配置文件，重启后镜像还在挂载。

\[root@localhost ~\]\# ls /mnt/repos/  
\[root@localhost ~\]\# mount /dev/cdrom /mnt/repos/  
mount: block device /dev/sr0 is write-protected, mounting read-only  
\[root@localhost ~\]\# cd /mnt/repos/  
\[root@localhost repos\]\# ls  
CentOS\_BuildTag  GPL       Packages                  RPM-GPG-KEY-CentOS-6           RPM-GPG-KEY-CentOS-Testing-6  
EFI              images    RELEASE-NOTES-en-US.hta

vim /etc/fstab (建议不要改成配置文件改成我这样，开启就崩溃)

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如果保存配置，系统重启后就报错。

怎么样才能恢复回来原来配置，（这里其实可以改配置文件，记得备份，这里疏忽了，给自己挖坑），单机模式进去是操作不了，会出现配置文件修改不了，明明是root用户但是修改不了。

网络找了许多方案，推荐[https://blog.csdn.net/xiezuoyong/article/details/80798113][https_blog.csdn.net_xiezuoyong_article_details_80798113]参考。

操作：（这里演示在虚拟机下操作）

1.进去系统光盘界面，按ESC启动镜像选择，选rescue install system

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpMjQ3NjMwNjc2_size_16_color_FFFFFF_t_70 1][]

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修改/etc/fstab文件中的配置，注释掉之前挂载的信息或者修改之前加入配置，保存：wq后退出.

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpMjQ3NjMwNjc2_size_16_color_FFFFFF_t_70 10][]

输入exit 退出chroot。

重启后，系统需要一段时间自检，修改内核参数，系统自检需要几分钟，自检好就恢复原来系统。

总结：修改配置文件，记得先备份，哪怕是加小小的配置文件。谨记前一条，熟悉怎么用救援模式拯救系统。

图下是系统正在自检。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpMjQ3NjMwNjc2_size_16_color_FFFFFF_t_70 11][]

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[https_blog.csdn.net_xiezuoyong_article_details_80798113]: https://blog.csdn.net/xiezuoyong/article/details/80798113
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