Alternatively, any keyword from sshconfig(5) or sshdconfig(5) that takes an algorithm list may be used as an alias for the corresponding queryoption. Causes most warning and diagnostic messages to be suppressed. I have a problem with ssh, I have a switch 6509, and it had two supervisors, one of them failed, and after that I could not enter to the switch by SSH. Here is the configuration and the show commands that I put. Aaa new-model ip domain-name sedapaldc.com.pe ip ssh version 2 line vty 0 4 exec-timeou.
ssh-add is a helper program for ssh-agent.
ssh-add adds RSA or DSA identity files to the ssh agent. For ssh-add to work properly, the agent should be running, and have the SSH_AUTH_SOCK environment variable set.
1. Fix “Could not Open” Error (and Add Default RSA/DSA identities)
By default, when you try to execute the ssh-add command, you might get “Could not open a connection to your authentication agent.” error message as shown below.
The reason is ssh-agent is not running.
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But, if you start the ssh-agent as shown below, you’ll still get the same error.
In order to fix the issue, you should start the ssh-agent as shown below.
Now, when you execute the ssh-add, it will add the ~/.ssh/id_rsa, ~/.ssh/id_dsa and ~/.ssh/identity files to ssh-agent, and will not throw any error message.
2. Display the entries loaded in ssh-agent
Ssh 5.3
Use either -l or -L as shown below to display all the RSA and DSA entries that are currently loaded into the ssh-agent.
The following examples shows that there are two entries currently loaded to the ssh-agent.
3. Delete all entries from ssh-agent
Use option -D as shown below to remove all the ssh entries from the ssh-agent.
4. Delete specific entries from ssh-agent
Using -d option, you can specify exactly what entries you like to delete.
The following example will remove only the default RSA entry from the ssh-agent.
5. Lock (or) Unlock the SSH Agent
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You can lock the ssh agent as shown below using -x option. Once you lock the agent, you cannot add, delete, or list entries in the ssh agent without a password.
After locking, if you try to add, you’ll se SSH_AGENT_FAILURE message as shown below.
Horn Speaker Amseco Ssh-54 System
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To unlock an agent, use -X option as shown below. Make sure you enter the same password that you gave while locking the agent. If you give a wrong password, you’ll set “Failed to unlock agent.” message.