Ssh – Ubuntu EC2 instance, changed root home directory and now unable to SSH in

amazon ec2ssh

I have an Amazon EC2 instance runnung Ubuntu 11.10. In an attempt to do a quick fix of a problem I changed the home diretory for the ubuntu user in the /etc/passwd to /srv/www. Now I can't ssh in to the box (I'm assuming) because it can't find .ssh/authorized_keys

I have FTP access to the box, and I can get access to the .ssh/authorized_keys file, but the directory /srv/www is owned by root so I can't just uploaded the .ssh folder there.

Any ideas?

Best Answer

A typical approach is to stop your instance (call it A) and create another instance where you mount A's disk and fix the problem (changing /etc/passwd in your case).

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sudo crontab -e edits root's crontab right? When you say you have $HOME/.awssecret, what is $HOME? root's home or yours?

You might want to think about using /etc/cron.d, you can additionally add the name of the user to execute the script as in these files (e.g. caution: slightly different syntax for the scripts)

Edit (answering your question in the comment):

Create a file /etc/cron.d/myEc2Crontab

make it contain:

SHELL=/bin/sh
PATH=whatever you need as your path
12 18 4 2 *  root ec2-consistent-snapshot --mysql --xfs-filesystem /vol vol-xxxxxxx >>/mnt/backup.log 2>&1

note the added 'root' just after the time specification, prior to your command. This specifies the user the command runs as.

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Is the code you need to get at mounted on an EBS? You can unmount it, and mount it to another instance I believe to get at the code.

EC2 Detach

Best Answer

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