Copying file from server in rescue mode

hokie1999 · 04-27-2017, 04:47 PM

Hello,

I am in rescue mode on a Centos 7 server. On this server, I created a file "mbr.gz" How would I copy this file to another server?

r3sistance · 04-27-2017, 06:00 PM

you haven't told us what access you have to the servers. You could use a USB stick, or you could bring up networking manually and SCP/SFTP/RSYNC it across /etc. Do you have physical access or is it remote?

hokie1999 · 04-27-2017, 07:33 PM

remote, no usb possible.

ifconfig eth0 ip netmask gw .. not work

Does networking work in rescue mode? Ambiguous answers internet-wide. if so, how? Thanks.

r3sistance · 04-27-2017, 07:43 PM

CentOS 7, should be able to do:

Code:

systemctl start network

if that doesn't work then you'd need to manually devices up with ifup.

You would need to ensure that your partitions are mounted first tho, so makesure the correct partitions appears in /proc/mounts. In Example:

Code:

$ grep "^/" /proc/mounts
/dev/mapper/centos-root / xfs rw,seclabel,relatime,attr2,inode64,noquota 0 0
/dev/vda1 /boot xfs rw,seclabel,relatime,attr2,inode64,noquota 0 0
/dev/mapper/centos-var /var xfs rw,seclabel,noatime,attr2,inode64,noquota 0 0
/dev/mapper/centos-tmp /tmp xfs rw,seclabel,nosuid,nodev,noexec,noatime,attr2,inode64,noquota 0 0
/dev/mapper/centos-tmp /var/tmp xfs rw,seclabel,nosuid,nodev,noexec,noatime,attr2,inode64,noquota 0 0
/dev/mapper/centos-home /home xfs rw,seclabel,relatime,attr2,inode64,noquota 0 0
/dev/mapper/centos-var_log /var/log xfs rw,seclabel,relatime,attr2,inode64,noquota 0 0

Naturally this won't match what you have.

syg00 · 04-27-2017, 07:49 PM

If you are logged in to a remote server I'd be betting the network is already up.
How you ship the file depends on what you have - and what impediments are in place (thinking PAM here). scp might work.

Giving more detail rather than terse responses will allow to to get better help.

hokie1999 · 04-27-2017, 07:53 PM

ok i'll try again, tx

hokie1999 · 04-27-2017, 08:56 PM

I see enoX-ifcfg in network-scripts. X is number > 0. can one of these be configured in rescue mode? Would i use DEVICE, IP, NETMASK, GATEWAY then a systemctl start for the network?

Get "Connection actiavation failed: No available devices found"

ifcfg-eth0 doesn't work. This is rescue mode now.

ondoho · 04-28-2017, 01:38 AM

if you are able to work on the remote server, that means you're "in" already, no?
have you tried scp?
how are you "getting into" the server?
what is the host machine? linux? windows with putty? something else?

and possibly more info required. without it, Ambiguous answers internet-wide.

hokie1999 · 04-28-2017, 07:51 AM

In remote server via ILO. In rescue mode, booted to CentOS iso. Set interface file ifcfg-ino1 with IP, netmask, gateway, etc. Created mbr. Need to get mbr file to another server. systemctl restart network.service give error described above. scp does not work. Ifconfig shows the interface ino1 is set with IP, netmask. Cannot ping gateway. Brand new server with no OS.

What else can I tell you?

May have to have tech at remote site put usb in and copy to that. Slow.

hokie1999 · 04-28-2017, 09:40 AM

I would say disregard this question. Doesn't appear do-able with iso being used here CentOS7-x86_64-DVD-1511.iso Thanks for your inputs on this.

r3sistance · 04-28-2017, 09:56 AM

Have you mounted the disks/partitions as I recommended earlier? After that you should then do a chroot to partition containing / to do the "systemctl start network".

hokie1999 · 04-28-2017, 12:41 PM

Yes, r3sistance, have done all of those items, no luck.

AwesomeMachine · 04-28-2017, 06:38 PM

Rescue mode on the install CD/DVD is good for a very few things, such as reinstalling the boot loader, or working in a chroot environment. If you just want to copy a file, use a live CD, like Knoppix.

The rescue shell is primitive. But it is indispensable for certain tasks. In this instance you want to use a live CD/DVD.