[Raspberry Pi 3]

Once you've installed the Linux agent and edited your config.xml, you will likely need to install the OpenSSL 1.0.0 package from Debian Jessie and then enable the Pulseway daemon and start it. The basic steps on my Pi2b were:

systemctl stop pulseway
wget http://ftp.debian.org/debian/pool/main/o/openssl/libssl1.0.0_1.0.1t-1+deb8u8_armhf.deb
dpkg -i libssl1.0.0_1.0.1t-1+deb8u8_armhf.deb
ldconfig
systemctl enable pulseway
systemctl start pulseway

Hopefully then you should find that the password gets encrypted in config.xml and your Pi shows up in your web console.

[Error on Debian 9.1 Stretch]

I was able to get the client running on my Pi2b by running the following:

systemctl stop pulseway
wget http://ftp.debian.org/debian/pool/main/o/openssl/libssl1.0.0_1.0.1t-1+deb8u8_armhf.deb
dpkg -i libssl1.0.0_1.0.1t-1+deb8u8_armhf.deb
ldconfig
systemctl start pulseway
systemctl status pulseway

● pulseway.service - LSB: Monitor and Control Everything IT from Any Smartphone or Tablet
   Loaded: loaded (/etc/init.d/pulseway; generated; vendor preset: enabled)
   Active: active (running) since Sun 2018-07-15 02:16:42 AEST; 11s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 18044 ExecStop=/etc/init.d/pulseway stop (code=exited, status=0/SUCCESS)
  Process: 18078 ExecStart=/etc/init.d/pulseway start (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/pulseway.service
           ├─18085 /usr/sbin/pulsewayd
           ├─18106 sh -c awk -v a="$(awk '/cpu /{print $2+$4,$2+$4+$5}' /proc/stat; sleep 1)" '/cpu /{split(a,b," "); print 100*($2+$4-b[1])/($2+$4+$5-b[2])}' /proc/stat 2>&1
           └─18107 sleep 1

Jul 15 02:16:42 prkpi2b systemd[1]: Starting LSB: Monitor and Control Everything IT from Any Smartphone or Tablet...
Jul 15 02:16:42 prkpi2b systemd[1]: Started LSB: Monitor and Control Everything IT from Any Smartphone or Tablet.
Jul 15 02:16:42 prkpi2b pulseway[18085]: Configuration read successfully!

 

# uname -a
Linux prkpi2b 4.14.34-v7+ #1110 SMP Mon Apr 16 15:18:51 BST 2018 armv7l GNU/Linux

# dpkg -l |grep libssl             
ii  libssl1.0.0:armhf                 1.0.1t-1+deb8u8              armhf        Secure Sockets Layer toolkit - shared libraries
ii  libssl1.0.2:armhf                 1.0.2l-2+deb9u3              armhf        Secure Sockets Layer toolkit - shared libraries
ii  libssl1.1:armhf                   1.1.0f-3+deb9u2              armhf        Secure Sockets Layer toolkit - shared libraries

# grep -i pulseway /var/log/syslog
Jul 15 02:08:20 localhost pulseway[17976]: /usr/sbin/pulsewayd: /usr/lib/arm-linux-gnueabihf/libcrypto.so.1.0.0: version `OPENSSL_1.0.0' not found (required by /usr/sbin/pulsewayd)
Jul 15 02:08:20 localhost pulseway[17976]: /usr/sbin/pulsewayd: /usr/lib/arm-linux-gnueabihf/libssl.so.1.0.0: version `OPENSSL_1.0.0' not found (required by /usr/sbin/pulsewayd)
Jul 15 02:12:31 localhost pulseway[18023]: /usr/sbin/pulsewayd: /usr/lib/arm-linux-gnueabihf/libcrypto.so.1.0.0: version `OPENSSL_1.0.0' not found (required by /usr/sbin/pulsewayd)
Jul 15 02:12:31 localhost pulseway[18023]: /usr/sbin/pulsewayd: /usr/lib/arm-linux-gnueabihf/libssl.so.1.0.0: version `OPENSSL_1.0.0' not found (required by /usr/sbin/pulsewayd)
Jul 15 02:16:42 localhost pulseway: Starting Pulseway Daemon version 5.4 (2018021301)
Jul 15 02:16:42 localhost pulseway: Configuration read successfully!

Then checked the console and could see my Pi in there. Note the "ldconfig" command on the 4th line in bold - that updates the LD cache (linked libraries) which I'm guessing is why you were still getting the errors even though you had installed the v1.0.0 package.