https://hurlster.com/wiki/index.php?action=history&feed=atom&title=SSHSSH - Revision history2026-08-23T18:26:49ZRevision history for this page on the wikiMediaWiki 1.38.4https://hurlster.com/wiki/index.php?title=SSH&diff=2522&oldid=prevGqwill69: /* Passwordless Login */2012-12-31T17:33:44Z<p><span dir="auto"><span class="autocomment">Passwordless Login</span></span></p>
<p><b>New page</b></p><div>== Passwordless Login ==<br />
=== Unix, Linux, Mac OS X, and Cygwin ===<br />
Users can set up SSH so that they have passwordless ssh access to DreamHost servers. ''(Please read 'Single Password Logon' for security concerns.)''<br />
<br />
On your home computer, you must generate an RSA private key:<br />
<pre><nowiki>ssh-keygen -t rsa</nowiki></pre><br />
<br />
It will prompt you for three things, hit enter to accept the default on all three.<br />
<br />
Next, you must copy your public key to DreamHost's server. Replace ''user'' and ''example.com'' with your username and domain name, respectively.<br />
<pre><nowiki>scp ~/.ssh/id_rsa.pub user@example.com:~/</nowiki></pre><br />
<br />
Now you must ssh to your account (using your password):<br />
<pre><nowiki>ssh user@example.com</nowiki></pre><br />
<br />
Now append the public key to your authorized keys file and delete the file you uploaded:<br />
<pre><nowiki><br />
mkdir .ssh<br />
cat id_rsa.pub >> .ssh/authorized_keys<br />
rm id_rsa.pub<br />
</nowiki></pre><br />
<br />
Now make sure permissions are set properly for all necessary files and directories:<br />
<pre><nowiki>chmod go-w ~<br />
chmod 700 ~/.ssh<br />
chmod 600 ~/.ssh/authorized_keys</nowiki></pre><br />
<br />
If everything is configured properly, you should be able to access your DreamHost account through SSH without a password now!<br />
For more information, see the man pages for ssh, ssh-keygen, and sshd.<br />
== SSH Speeds ==<br />
Performance hit on SCP/SFTP transfers, below is a table of performance stats based upon ciphers.<br />
aes128-ctr <br />
600.iso 600MB 30.0MB/s 0:20<br />
600.iso 600MB 28.6MB/s 0:21<br />
aes192-ctr <br />
600.iso 600MB 26.1MB/s 0:23<br />
600.iso 600MB 25.0MB/s 0:24<br />
aes256-ctr <br />
600.iso 600MB 24.0MB/s 0:25<br />
600.iso 600MB 24.0MB/s 0:25<br />
arcfour256 <br />
600.iso 600MB 75.0MB/s 0:08<br />
600.iso 600MB 85.7MB/s 0:07<br />
arcfour128 <br />
600.iso 600MB 85.7MB/s 0:07<br />
600.iso 600MB 85.7MB/s 0:07<br />
aes128-cbc <br />
600.iso 600MB 50.0MB/s 0:12<br />
600.iso 600MB 46.2MB/s 0:13<br />
3des-cbc <br />
600.iso 600MB 12.2MB/s 0:49<br />
600.iso 600MB 12.0MB/s 0:50<br />
blowfish-cbc <br />
600.iso 600MB 40.0MB/s 0:15<br />
600.iso 600MB 42.9MB/s 0:14<br />
cast128-cbc <br />
600.iso 600MB 27.3MB/s 0:22<br />
600.iso 600MB 23.1MB/s 0:26<br />
aes192-cbc <br />
600.iso 600MB 46.2MB/s 0:13<br />
600.iso 600MB 42.9MB/s 0:14<br />
aes256-cbc <br />
600.iso 600MB 40.0MB/s 0:15<br />
600.iso 600MB 40.0MB/s 0:15<br />
arcfour <br />
600.iso 600MB 85.7MB/s 0:07<br />
600.iso 600MB 85.7MB/s 0:07<br />
* Options<br />
ssh -oCiphers='arcfour' user@host<br />
<br />
scp -oCiphers='arcfour'<br />
<br />
rsync -e'ssh -oCiphers=arcfour'<br />
<br />
[[Category:Linux]]</div>Gqwill69