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Showing posts from December, 2011

Guide to logging in using ssh without a password

The trick here is to understand which side is the client and which is the server. Pretty simple in concept, but the reality is a little different. You copy the public key of the client user to the server user's .ssh directory in the authorised keys. The server user only needs a .ssh directory http://linuxproblem.org/art_9.html There is also this guide http://www.thegeekstuff.com/2008/11/3-steps-to-perform-ssh-login-without-password-using-ssh-keygen-ssh-copy-id/ There is also this one http://serverfault.com/questions/398/why-wont-automatic-login-through-ssh-with-authorized-keys-work And this seems to be the real fix... chmod 0600 ~/.ssh/authorized_keys

Reverse mapping ssh problem

See this link  http://www.electrictoolbox.com/reverse-mapping-possible-break-in-ssh/ However, for me, it was simply solved by entering the reverse name and it's corresponding IP in the hosts file of the client machine that was attempting the connection.

Host Keys in different Virtual Machines

Vendor Host Key Products VMware Ctrl+Alt (Windows and Linux) ESX, ESXi, Workstation, Server, Player, Ace VMware Ctrl-Cmd (Mac) Fusion Microsoft Right Alt Virtual Server 2005 R2, Hyper-V, Virtual PC 2007 Citrix Ctrl+Alt XenServer Virtual Iron Ctrl+Alt Virtual Iron 4.x KVM Right Ctrl KVM, Qemu Sun xVM Right Ctrl xVM Server, VirtualBox Parallels Ctrl+Alt (Windows) Workstation Parallels Ctrl+Option(Alt) (Mac) Workstation

Javascript Form Validation

It's real simple. All you need to do is call a javascript function in a html  " onsubmit " in the form tag as a javascript return, like this       <form method="post" action="dosomething.php" onsubmit="return validateForm();"> If the code completes ok, the form is then sent to the page listed in "action" http://www.w3schools.com/js/js_form_validation.asp If the function specified in the onsubmit returns false, then the form is not sent to the page mentioned in action.