{"id":295,"date":"2013-01-10T12:28:47","date_gmt":"2013-01-10T12:28:47","guid":{"rendered":"http:\/\/vickistan.com\/?p=295"},"modified":"2025-01-13T16:25:47","modified_gmt":"2025-01-13T16:25:47","slug":"ssh-stuff","status":"publish","type":"post","link":"https:\/\/vickistan.com\/?p=295","title":{"rendered":"SSH Agent stuff"},"content":{"rendered":"

Use the -i option to specify a new key<\/strong><\/p>\n

ssh -i newkey root@108.166.84.188<\/p>\n

How to strip a passphrase from an openssl key<\/strong><\/p>\n

cp filename.key filename.key.encrypted
\nopenssl rsa -in filename.key -out filename.key.nopass
\ncp filename.key.nopass filename.key<\/p>\n

How to add or change a passphrase to an openssl key<\/strong><\/p>\n

If you created an openssl key without a password or if you need to change the password:<\/p>\n

ssh-keygen -p -f ~\/.ssh\/id_rsa<\/p>\n

———————————————————————————————–<\/p>\n

Starting the SSH Agent<\/strong><\/p>\n

There are two ways to start the ssh-agent. Either will do the trick.<\/p>\n

Start the ssh-agent using backquotes to pass information about the agent back to the shell.<\/p>\n

`eval ssh-agent` runs an ssh-agent by forking a process off your current
\nlogin shell. It outputs some commands to set environment variables:
\nSSH_AUTH_SOCK or SSH2_AUTH_SOCK and SSH_AGENT_PID or SSH2_AGENT_PID. The eval part causes the shell to interpret the commands output by
\nssh-agent, thereby setting the environment variables. (If you leave off
\nthe eval, you\u2019ll see the output.) The problem is that, because it got
\nforked, it is inaccessible to the shell and keeps running until killed
\nmanually. And even then the environment variables remain set until you
\nunset them.<\/p>\n

Start the ssh-agent and spawn a subshell.<\/strong><\/p>\n

ssh-agent bash
\n(ssh-agent \/bin\/sh, ssh-agent \/bin\/csh, ssh-agent $SHELL, ssh-agent
\nmy-shell-script all work too btw)<\/p>\n

With this method, the ssh-agent process runs in the foreground, spawning
\na subshell and setting the environment variables up automatically. The
\nrest of the login session runs in the subshell. When the shell is killed
\nthe cleanup is done automatically. Of course, any background processes
\nrun before initiating the ssh-agent in this way are not accessible from
\nwithin the subshell.<\/p>\n

1) Add root\u2019s identity
\nssh-agent bash
\n(ssh-agent \/bin\/sh, ssh-agent \/bin\/csh, ssh-agent $SHELL, ssh-agent
\nmy-shell-script all work too btw)
\n2) Add the ssh key to the agent
\nssh-add ~\/.ssh\/id_root_dsa
\n3) Log onto a machine setup to use ssh-keys
\nssh -2 -A root@$MACHINENAME<\/p>\n

Copying data from one machine to a tape drive on another.<\/p>\n

1) Add root\u2019s identity
\nssh-agent bash
\n(ssh-agent \/bin\/sh, ssh-agent \/bin\/csh, ssh-agent $SHELL, ssh-agent
\nmy-shell-script all work too btw)
\n2) Add the ssh key to the agent
\nssh-add ~\/.ssh\/id_root_dsa
\n3) Pipe the output of tar to a machine setup to use ssh-keys<\/p>\n

tar zcvf \u2013 \/scratch\/vickistan\/cl-pdk\/ |ssh -A root@$MACHINENAME \u201ccat > \/dev\/nst2\u2033<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Use the -i option to specify a new key ssh -i newkey root@108.166.84.188 How to strip a passphrase from an openssl key cp filename.key filename.key.encrypted openssl rsa -in filename.key -out filename.key.nopass cp filename.key.nopass filename.key How to add or change a … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,7],"tags":[],"class_list":["post-295","post","type-post","status-publish","format-standard","hentry","category-linux","category-ssh"],"_links":{"self":[{"href":"https:\/\/vickistan.com\/index.php?rest_route=\/wp\/v2\/posts\/295","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vickistan.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vickistan.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vickistan.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vickistan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=295"}],"version-history":[{"count":11,"href":"https:\/\/vickistan.com\/index.php?rest_route=\/wp\/v2\/posts\/295\/revisions"}],"predecessor-version":[{"id":934,"href":"https:\/\/vickistan.com\/index.php?rest_route=\/wp\/v2\/posts\/295\/revisions\/934"}],"wp:attachment":[{"href":"https:\/\/vickistan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vickistan.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vickistan.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}