Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. It only takes a minute to sign up.
Sign up to join this community
I used in my bash script the follwing cli , in order to send the public key to remote machine
sshpass -p $pass scp /root/.ssh/authorized_keys root@$remote_host:~/.ssh/authorized_keys
but since we want to append the public keyes from other host then I am searching the approach top append
in bash I know that the option is to use ">>" but how to use the append with my approach ?
or maybe other solution ?
You can also use ssh-copy-id, which is a tool to do exactly what you want: add one or more keys to the authorized_keys of a remote system.
authorized_keys file.
ssh-copy-id requires the key filename to end with .pub: ln -s authorized_keys ~/.ssh/authorized_keys.pub; ssh-copy-id -i ~/.ssh/authorized_keys.pub $remote_host
ssh-copy-id(1) says (emphasis mine) "-i identity_file Use only the key(s) contained in identify_file...", so acceptance of multiple keys in a single file seems intentional.
Use ssh together with tee -a file:
< /root/.ssh/authorized_keys sshpass -p "$pass" ssh root@"$remote_host" "tee -a ~/.ssh/authorized_keys"
or ssh with cat >> file if you prefer:
< /root/.ssh/authorized_keys sshpass -p "$pass" ssh root@"$remote_host" "cat >> ~/.ssh/authorized_keys"
Both tee and cat will read from stdin, which is sent to ssh with < file.
The difference is, that tee, unlike >> will print what it appends.
Note:
The double quotes are needed, otherwise the >> or ~ will be interpreted by your shell before sending it to ssh command.
< /root/.ssh/authorized_keys part, that is the source. It sends the content of the file to stdin of ssh command. and tee or cat reads that.