Reset root password (Debian CentOS)

First, debian7.8

1. On the Grub Boot loader menu, select the entry you want to enter, type "E" to enter edit mode 650) this.width=650; "Src=" http://s3.51cto.com/wyfs02/M02/6F/2D/ Wkiol1wt84cjiyv3aaez10krv98882.jpg "title=" 111.png "alt=" Wkiol1wt84cjiyv3aaez10krv98882.jpg "/>

2. Add Init=/bin/bash after quiet
Press CTRL-C or F10 to start the machine 650) this.width=650; "Src=" http://s3.51cto.com/wyfs02/M02/6F/30/ Wkiom1wt8ikqtawaaahf0g8o-bu554.jpg "title=" Ccc.png "alt=" Wkiom1wt8ikqtawaaahf0g8o-bu554.jpg "/>

3, enter mount after seeing the root partition is RO (read-only state) 650) this.width=650; "Src=" http://s3.51cto.com/wyfs02/M01/6F/2D/ Wkiol1wt9cag5zkhaaeer7z8oju257.jpg "title=" Ddd.png "alt=" Wkiol1wt9cag5zkhaaeer7z8oju257.jpg "/>
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4, directly modify the root password will be error
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5. Mount the root partition in read/write mode and change the password again.
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6. Parameter description
Init=/bin/bash
Using ROOT to get the/bin/bash program

Second, centos6.6
1. On the Grub Boot loader menu, select the entry you want to enter, and type "E" to enter edit mode

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/6F/2D/wKioL1WT9L-zmSf0AAEzeQ9DZDM409.jpg "title=" Hhh.png "alt=" Wkiol1wt9l-zmsf0aaezeq9dzdm409.jpg "/>

2, press ENTER after adding a single after quiet press ENTER, press B to restart the machine 650) this.width=650; "Src=" http://s3.51cto.com/wyfs02/M02/6F/30/ Wkiom1wt8wbydtynaagrpnyihsa351.jpg "title=" Iii.png "alt=" Wkiom1wt8wbydtynaagrpnyihsa351.jpg "/>

650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/6F/30/wKiom1WT8y_i4y15AADPbuRVd7U850.jpg "title=" Jjj.png "alt=" Wkiom1wt8y_i4y15aadpburvd7u850.jpg "/>

3, directly modify the root password
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Ps:debian Additional kernel parameters Init=/bin/bash also apply to CentOS

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Reset root password (Debian CentOS)