Enable ssh in emergency mode for centos 9

Question

I'm trying make a backup system for my Centos Stream 9 headless server by installing a cloned system disk on a newer machine.

No surprise, the newer machine booted into emergency mode (hardware different).

As every one know, There are very limited functions are available in emergency mode,

I can enable network by using:

ip link 
ip link set dev enp1s0 up 
ip addr add 10.0.1.89/24 dev enp1s0
ip route add default via 10.0.1.1

then NIC status is up and it can accept ping over LAN.

But when I try to check the sshd status, it is not work at all. I tried to activate by:

systemctl start sshd

not work. It simply return to emergency mode and request root password.

As I need to:

Rebuilding initramfs
Rebuilding /etc/fstab
Rebuilding GRUB2
Rebuilding GRUB2 with LVM

to make the cloned disk works on new hardware by using copy and paste (It is very import). I have to use ssh to connect to the new machine.

Could any one please advise:

How to enable sshd service in emergency mode of Centos Stream 9?

Best regarding

Netan · Accepted Answer · 2023-01-23 21:34:14Z

0

Have you tried to use the following guide?

If it doesn't work - do you have any output for the command systemctl start sshd? Youv'e only mentioned "not work".

answered Jan 23, 2023 at 21:34

Netan

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I tried edit rescue boot command by add "inst.sshd=1" at the end of line and then boot to rescue mode, but it always boot to emergency mode. When I tried to run [systemctl start sshd], it never give response and return to emergency mode to request root password status after a while.
– cidy.long
Commented Jan 23, 2023 at 21:46
And how about the last answer here? unix.stackexchange.com/a/508374
– Netan
Commented Jan 23, 2023 at 22:31
No. The new machine never booted into rescue mode, but emergency mode.
– cidy.long
Commented Jan 23, 2023 at 22:34

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