keychain - 2.8.5-2 main

Keychain is an OpenSSH key manager, typically run from ~/.bash_profile. When
keychain is run, it checks for a running ssh-agent, otherwise it starts one.
It saves the ssh-agent environment variables to ~/.keychain/\$\{HOSTNAME\}-sh,
so that subsequent logins and non-interactive shells such as cron jobs can
source the file and make passwordless ssh connections. In addition, when
keychain runs, it verifies that the key files specified on the command-line
are known to ssh-agent, otherwise it loads them, prompting you for a password
if necessary.