About the Linux startup rescue mode for recovery steps

Because I had previously done the/etc/passwd file, so that the subsequent start-up failure problem.

After modifying /etc/passwd , the system will appear /etc/passwd-is Linux regular auto-generated backup

Let's go into rescue mode and move the/mnt/sysiamge/etc/passwd-to rename.

what the rescue model does:

You can change the root password;

Recover hard disk, file system operation;

When the system starts, it can only be started by rescue mode;

The steps to start the rescue mode are as follows:

Virtual machines in the case. (The first step is to load the disc and connect at startup.) ）

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1, boot into the BIOS settings (each computer into the BIOS of the method different according to their own computer access), boot boot sequence for CD-ROM priority to start the CD drive using the keypad's +-number adjustment in the upper and lower order, set up and then save and exit.

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2, restart the system after entering the installation Start menu, the upper and lower keys to move to the Rescueinstall system rescue installation systems;

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3. Select the language and keep the default 中文版

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4, select the keyboard type, keep the default us

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5, whether to start the network, you need to choose according to your actual situation, if you need to copy data through the network, select Yes, here we choose No;

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6, enter into the rescue interface, select Continue

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7, the system is mounted under/mnt/sysimage if you want to run the Chroot/mnt/sysimage command in the root environment, click OK

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8, three kinds of options: Shell into the command line mode; FAKD is the diagnostic mode; reboot restart the computer; we choose the shell here.

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9. Enter the shell command line and the prompt is bash-4.1#

ls/mnt/sysimage/displays files that are mounted as root directories

Execute chroot/mnt/sysimage/to move the files under the/mnt/sysimage/directory to the root directory;

Command after prompt is sh-4.1#

LS is displayed as the root directory of the file;

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10. Here we carry out the ls/mnt/sysimage/etc/passwd-(when the tab is complete, we need to change the passwd-name and use the MV. )

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Here we'll use the MV command.

mv/mnt/sysimage/etc/passwd-/mnt/sysimage/etc/passwd

Then use cat to view the files inside the/MNT/SYSIMAGE/ETC/PASSWD

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Use reboot to reboot after correct. Enter the system normally.

This article is from the IT Network blog, so be sure to keep this source http://531572034.blog.51cto.com/4383413/1763635

About the Linux startup rescue mode for recovery steps