Linux – How to use PuTTY to connect to a local server in a DHCP network without specifying the IP

Your public key has to be in ~/.ssh/authorized_keys on the target box. If you want more than one key in this, just copy them over to the target box and append them like this:

cat id_rsa.pub >> ~/.ssh/authorized_keys

Also, read this info about putty key compability and how to convert keys.

To change the PuTTY SSH session window title (one by one manually by the PuTTY GUI):

For Windows & Debian

1. Load a session from PuTTY.
2. On left side tree menu, click on: Window → Behaviour.
3. On the right panel, in the Window title text box enter your title.
4. Save the session.

To change the PuTTY SSH session window title (for all sessions by command line):

For Debian 8 (Jessie)

1. Go to the folder where PuTTY stores sessions: /home/nolwennig/.putty/sessions

   Note: replace nolwennig with your username

2. Assign to parameter WinTitle the saved session file name for each saved session file with something like this:

   find . -type f -exec sed -e 's/^WinTitle=/WinTitle=%f/g' {} \;

   It works fine if no WinTitle is recorded

For Windows

1. PuTTY stores sessions in Windows registry HKEY_CURRENT_USER\Software\Simontatham\PuTTY\Sessions

   Note: not replace SimonTatham with your username.

2. You can export this section with a command like this:

   C:> regedit /e "%userprofile%\desktop\putty-registry-sessions.reg" HKEY_CURRENT_USER\Software\Simontatham\PuTTY\Sessions
   

3. It must be possible to make a script that updates the putty-registry-sessions.reg file to change the value of WinTitle for each of the saved sessions.

Sources & inspirations:

• kurumi for https://stackoverflow.com/a/5456142/4457531
• brandizzi for https://stackoverflow.com/a/6739322/4457531
• FGreg for https://stackoverflow.com/a/13012743/4457531
• m0nhawk for https://stackoverflow.com/a/13023979/4457531