Single-User mode
Single-user equivalent to Windows security mode
First reboot Linux, a few common commands:
Reboot Init 6 Shutdown-r now
Shutdown command:
Init 0 Poweroff
Right > Power > Restart Client
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Grub interface, GRUB is a startup tool to find the system boot disk
Press the direction key to select the above
Press E to enter edit
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Find linux16 this line
Find RO (read-only) to RW (read-write) and add init=/sysroot/bin/sh
Sysroot is the directory where the original system resides
Ctrl+x
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This interface is equivalent to entering the "Safe Mode"
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Can see
ls/sysroot/boot/
ls/sysroot/tmp/
It's temporarily empty.
Cat/sysroot/root/.ssh/authorized_keys
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chroot/sysroot/
Cat/root/.ssh/authorized_keys can use the original system command at this time.
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passwd Root
Found garbled
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Ctrl +c cancel the currently running command
Execution: lang=en
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Run passwd Root again
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To run after the change:
Touch/.autorelabel
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After power > Restart client
Login successful
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If you forget your Grup password, you should use rescue mode
Run level from 0-6 total 7 levels
0: Turn off the machine
1: Single User
2 3 4: Multi-user mode
5: Graphical interface
6:reboot
Ls-l/usr/lib/systemd/system/runlevel*target
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First shutdown: Init 0
To edit the virtual machine again
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Ls/mnt/sysimage/root/.ssh/authorized_keys
Cat/mnt/sysimage/root/.ssh/authorized_keys
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Chroot/mnt/sysimage
passwd Root
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After changing the password, go to Settings,
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Restart:
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Login Test
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Landing success
Cloning a virtual machine
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Login serverlooker-02
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Change the IP of serverlooker-02
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Restart
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Test the external network, can ping through
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Change the host name of aminglinux-02: serverlooker-02
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Change the host name of aminglinux-01: serverlooker-01
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Add serverlooker-02 to Xshell
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Clone the aminglinux-02, spare.
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Linux machines log in to each other
Use the W command to view the terminals connected to the SERVERLOOKER-01
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Use serverlooker-02 to connect 01
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View current Login User WhoAmI
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Connect by specifying a port:
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Key authentication between two Linux implementations
Use 02 to connect 01
Tool: Ssh-keygen generate key pair
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Default carriage return, generating a key pair
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Copy 02 of the public key contents to 01
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VI Write
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01 of SELinux Off
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Use 02 even 01 without entering a password.
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The connection was successful.
This article is from the "Serverlooker" blog, make sure to keep this source http://13279218.blog.51cto.com/13269218/1974412
Single-user mode, rescue mode, clone virtual machine, and Linux machine log in to each other