Generate an ssh key
Using an RSA algorithm:
ssh-keygen -t rsa -C "key_identifier"
ssh files permissions
A private key file must be accessed only by the owner:
chmod 600 id_rsa
A public key file should be readable by other users:
chmod 644 id_rsa.pub
config file must be accessed only by the owner:
chmod 600 config
Basic user ssh config file example
Host host1 HostName host1 IdentityFile ~/.ssh/host1 Host * IdentityFile ~/.ssh/default
In order to open an ssh connection to
host1 key will be used. The
default key will be used in all other cases.
Remove the passphrase from the key
- For the key with the default name (id_rsa):
You will need to enter the old passphrase and hit Enter for the neww passphrase prompt.
- If you have several keys and you want to remove the passphrase from the key with a non-default name:
ssh-keygen -p -f <name of the keyfile>
ssh-keygen -p -f ~/.ssh/id_rsa_custom
Resolve sign and send from agent: agent refused operation error
In order to resolve a problem of ssh connection, producing a
sign and send from agent: agent refused operation error:
Fedora 33, Bitbucket: Resolve send_pubkey_test: no mutual signature algorithm error
In order to resolve a problem of ssh connection to Bitbucket on Fedora 33, producing a
send_pubkey_test: no mutual signature algorithm error, it is necessary to create a new ssh key using ED25519 algorithm:
ssh-keygen -t ed25519 -C "key_identifier"
Reference: Bitbucket support