04-01-2019
Quote:
Originally Posted by
Shubham1182
Hello Team,
Please help me to solve my Problem,
By mistake, I give full permission to /(root) directory. by using the following command "chmod -R 777 /"
after this, the client asks for the password to login via ssh. Before that, I an able to Login without a password.
Please help me to retrieve changes.
Thank you.
You didn't just make your root directory readable, writeable, and searchable by everyone in the world; you made every file on your system readable, writeable, changeable, executable, delectable, and searchable by anyone who is able to access your system in any way shape or form.
I strongly suggest that you shut down the system as quickly as possible.
Then you can boot it up in single-user mode and try to restore your system to a stable point before you destroyed the system's self-protection capabilities by restoring everything from a recent backup dump. (You do perform regular backups, don't you?)
There is no "undo" command that can recover from you making every file on your system readable, writeable, executable, and searchable by everyone in the world!
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LEARN ABOUT LINUX
ssh-copy-id
SSH-COPY-ID(1) General Commands Manual SSH-COPY-ID(1)
NAME
ssh-copy-id - install your public key in a remote machine's authorized_keys
SYNOPSIS
ssh-copy-id [-i [identity_file]] [user@]machine
DESCRIPTION
ssh-copy-id is a script that uses ssh to log into a remote machine and append the indicated identity file to that machine's ~/.ssh/autho-
rized_keys file.
If the -i option is given then the identity file (defaults to ~/.ssh/id_rsa.pub) is used, regardless of whether there are any keys in your
ssh-agent. Otherwise, if this:
ssh-add -L
provides any output, it uses that in preference to the identity file.
If the -i option is used, or the ssh-add produced no output, then it uses the contents of the identity file. Once it has one or more fin-
gerprints (by whatever means) it uses ssh to append them to ~/.ssh/authorized_keys on the remote machine (creating the file, and directory,
if necessary.)
NOTES
This program does not modify the permissions of any pre-existing files or directories. Therefore, if the remote sshd has StrictModes set in
its configuration, then the user's home, ~/.ssh folder, and ~/.ssh/authorized_keys file may need to have group writability disabled manu-
ally, e.g. via
chmod go-w ~ ~/.ssh ~/.ssh/authorized_keys
on the remote machine.
SEE ALSO
ssh(1), ssh-agent(1), sshd(8)
OpenSSH 14 November 1999 SSH-COPY-ID(1)