Restart ssh-agent

Restart ssh-agent

$ ssh-add
Could not open a connection to your authentication agent.

$ killall ssh-agent; eval `ssh-agent`
Agent pid

$ env | grep ^SSH
SSH_AGENT_PID=
SSH_CLIENT=192.168.1.1
SSH_TTY=/dev/
SSH_AUTH_SOCK=/tmp/
SSH_CONNECTION=192.168.1.1

$ ssh-add
Enter passphrase for /home/user/.ssh/id_rsa:
Identity added: /home/user/.ssh/id_rsa (/home/user/.ssh/id_rsa)