How to automatically add keyfile and passphrase to ssh-agent?

Linux 4.4.0-34-generic #53-Ubuntu SMP Wed Jul 27 16:06:39 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux I use the script to start ssh-agent and start other script (which is using *expect* to sent passphrase to agent). #!/bin/bash eval ssh-agent -s /root/script2 **/root/script2:** #!/usr/bin/expect -f spawn ssh-add /root/.ssh/key expect "Enter passphrase for /root/.ssh/key:" send "passphrase\n"; interact All scripts are +x Passphrase is valid 100% After starting first script I get: Agent pid 3985 spawn ssh-add /root/.ssh/key Enter passphrase for /root/.ssh/key: Identity added: /root/.ssh/key (/root/.ssh/key) As you see, *agent started* and *Identity added* BUT when I try "*ssh-add -l*" I get: Error connecting to agent: No such file or directory But process is still working with 3985 PID. Why it tells me *Identity added* but *ssh-add -l* didn't work? :( Ok, I try manually eval ssh-agent and add keyfile: root@:~# eval ssh-agent -s Agent pid 4063 root@:~# ssh-add -l The agent has no identities. root@:~# ssh-add /root/.ssh/key Enter passphrase for /root/.ssh/key: Identity added: /root/.ssh/key (/root/.ssh/key) root@:~# ssh-add -l 4096 SHA256:FxPiCFYOiRree0ogNPpo81DTDUqmr1Brlo0LFnFK12o /root/.ssh/key (RSA) Why it work when I try to run it manually? How to fix that? I want to add that to rc.local to autostart it when PC starts. UPD if I try to run only **script2** manually, it works (key adds to agent). So I thing problem is with eval sh-agent, but I don't know what's wrong