keychain ssh-agent front-end
Shell Makefile
Latest commit f6f53f6 Jan 21, 2017 @apinsard apinsard FL-3404: Set max-cache-ttl in addition to default-cache-ttl
for GPG key timeout. default-cache-ttl alone can't exceed the value
of max-cache-ttl which is 2 hours by default.

Introduction to Keychain

Official documentation for Keychain can be found on the official Keychain wiki page.

Keychain helps you to manage ssh and GPG keys in a convenient and secure manner. It acts as a frontend to ssh-agent and ssh-add, but allows you to easily have one long running ssh-agent process per system, rather than the norm of one ssh-agent per login session.

This dramatically reduces the number of times you need to enter your passphrase. With keychain, you only need to enter a passphrase once every time your local machine is rebooted. Keychain also makes it easy for remote cron jobs to securely "hook in" to a long running ssh-agent process, allowing your scripts to take advantage of key-based logins.