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Top Forums UNIX for Dummies Questions & Answers add a string to a file without line break Post 302721919 by stunn3r on Friday 26th of October 2012 03:45:47 AM
Old 10-26-2012
Quote:
Originally Posted by elixir_sinari
Change
Code:
ssh ${_user}@${_ip} "sudo /bin/sed -i '$s/$/ elevator=noop/' /home/wadhwaso/test "

to
Code:
ssh ${_user}@${_ip} 'sudo /bin/sed -i "\$s/\$/ elevator=noop/" /home/wadhwaso/test'

.
Single-quotes lose their ability of quoting when they are enclosed within double-quotes. So, your shell will still look within that string and expand $s to a null string even before ssh is executed.
That worked, Thanks a lot Elixir ..

can you tell me one thing more, I want to add that string "elevator=noop" in /etc/grub.conf at the end of all the lines starting with "kernel", so i did:
Code:
ssh ${_user}@${_ip} 'sudo /bin/sed -i "/kernel/ \$s/\$/ elevator=noop/" /etc/grub.conf'

but its not working, it gave me following error:

HTML Code:
sed: -e expression #1, char 10: unknown command: `$'
 

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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)
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