This way, you can automate cross-server processes.
Now you can log into any of your remote hosts without providing a password for SSH user authentication. Start SSH Agent Login to Remote Linux Server without Password After starting the ssh-agent, add your private key to it as follows: # eval "$(ssh-agent -s)" Next, use ssh-agent to manage your keys, which holds your decrypted private key in memory and uses it to authenticate logins. Now run the ssh-copy.sh script and specify your public key file as the first argument as shown in the screenshot: #. Then make the script executable with the chmod command as shown. Ssh-copy-id -i $PUBLIC_KEY_FILE $IP 2>$ERROR_FILEĮcho "Public key successfully copied to $IP" You can run the same command on multiple servers with one shot. 3.Multi Command Sender (MCS) This is another beautiful feature. This will enables you to view multiple sessions at a time. #!/bin/bashĮcho "File '$PUBLIC_KEY_FILE' not found!" Second best feature is apart from displaying multiple PuTTY sessions in Tabs, Putt圜M can also show different PuTTY sessions in panels.
# vim ~/.bin/ssh-copy.shĬopy and paste the following code in the file (replace the following variables accordingly USER_NAME – the username to connect with, HOST_FILE – a file which contains the list of hostnames or IP addresses, and ERROR_FILE – a file to store any ssh command errors). Next, create a shell script that will help in copying a public key to multiple remote Linux hosts. Generate SSH Key in Linux Create a Shell Script for Mulitple Remote Logins Create a New SSH Key in Linuxįirst, generate the SSH key pair (the private/identity key that an SSH client uses to authenticate itself when logging into a remote SSH server and the public key stored as an authorized key on a remote system running an SSH server) using the ssh-keygen command as follows: # ssh-keygen
In this article, we will demonstrate how to create an SSH key pair and copy the public key to multiple remote Linux hosts at once, with a shell script. 4.2.Related Read: How to Secure and Harden OpenSSH Server.4.2.2 ‘What to do if the log file already exists’.Note that the non-SSH logging options (‘Printable output’ and ‘All session output’) only work with PuTTY proper in programs without terminal emulation (such as Plink), they will have no effect, even if enabled via saved settings. (The same caveats as the previous mode apply, of course.) This could be useful to diagnose corruption in transit.
In this mode, as well as the decrypted packets (as in the previous mode), the raw (encrypted, compressed, etc) packets are also logged. BE WARNED that if you log in using a password, the password can appear in the log file see section 4.2.4 for options that may help to remove sensitive material from the log file before you send it to anyone else. You might need this to debug a network-level problem, or more likely to send to the PuTTY authors as part of a bug report. In this mode (which is only used by SSH connections), the SSH message packets sent over the encrypted connection are written to the log file (as well as Event Log entries). This is a particularly useful mode if you are experiencing problems with PuTTY's terminal handling: you can record everything that went to the terminal, so that someone else can replay the session later in slow motion and watch to see what went wrong.
If you view the log file in a text editor, therefore, you may well find it full of strange control characters. In this mode, everything sent by the server into your terminal session is logged. This might be a useful mode if you want to read a log file in a text editor and hope to be able to make sense of it. The various terminal control codes that are typically sent down an interactive session alongside the printable text will be omitted. In this mode, a log file will be created and written to, but only printable text will be saved into it. Press OK to save your settings - your connection will be added to the list of servers. We strongly recommend you to leave Password field blank and input password manually in PuTTY window. If you leave it blank, you will be prompted for your login name in PuTTY window. This is the default option in this mode PuTTY will not create a log file at all. Input your login name in User name field. The main option is a radio-button set that specifies whether PuTTY will log anything at all. The Logging configuration panel allows you to save log files of your PuTTY sessions, for debugging, analysis or future reference. Previous page next page 4.2 The Logging panel