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$ env SHELL=/bin/sh ssh-agent SSH_AUTH_SOCK=/tmp/ssh-XXN54U4g/agent.3950; export SSH_AUTH_SOCK; SSH_AGENT_PID=3951; export SSH_AGENT_PID; echo Agent pid 3951;
$ env SHELL=/bin/tcsh ssh-agent setenv SSH_AUTH_SOCK /tmp/ssh-XXPC7hgb/agent.3948; setenv SSH_AGENT_PID 3949; echo Agent pid 3949;