From the gnome project;
- network-wired-connected.png
- network-wired-disconnected.png

Anvil by Christopher T. Howlett from the Noun Project (https://thenounproject.com/term/anvil/90190/)
- anvil_icon.png

Anvil and Hammer by Ivana Milchanska from the Noun Project (https://thenounproject.com/term/anvil/226943/)
- striker_icon.png 

Users by Edgar Vargas, US from the Noun Project (https://thenounproject.com/term/user/13635/)
- users_icon.png

User by Wilson Joseph from the Noun Project (https://thenounproject.com/term/user/43761/)
- users_icon_2.png

Question by Travis Avery from the Noun Project (https://thenounproject.com/term/question/587291/)
- help_icon.png

Sync by Edward Boatman from the Noun Project (https://thenounproject.com/term/sync/290/)
- sync.png

update by sofi from the Noun Project (https://thenounproject.com/term/update/1723034/)
- update.png

back by K from the Noun Project (https://thenounproject.com/term/back/453801/)
- back.png

Refresh by Denis Klyuchnikov from the Noun Project (https://thenounproject.com/term/refresh/1147205/)
- refresh.png

configure by Gregor Cresnar from the Noun Project (https://thenounproject.com/term/configure/485294/)
- striker_configure.png / configure-network.png

customize by Trusted Icons from the Noun Project (https://thenounproject.com/term/customize/538026/)
- configure_icon.png

power by Blair Adams from the Noun Project (https://thenounproject.com/search/?q=power&i=865890)
- power_icon.png

reset by Mooms from the Noun Project (https://thenounproject.com/search/?q=reset&i=1033425)
- reboot_icon.png

Target by bezier master from the Noun Project (https://thenounproject.com/term/target/898037/)
- install_target.png

Task by Ramesha from the Noun Project (https://thenounproject.com/term/task/1212201/)
- tasks_icon.png

Setup by Eucalyp from the Noun Project (https://thenounproject.com/term/setup/1453246/)
- build_icon.png

configure by iconesia from the Noun Project (https://thenounproject.com/term/configure/1651241/)
- prep-host_icon.png

Folder by Mint Shirt from the Noun Project (https://thenounproject.com/term/folder/402164/)
- files_icon.png

Broken Key by I Putu Kharismayadi from the Noun Project (https://thenounproject.com/term/folder/1481931/)
 - broken_key.png

Mail By unlimicon, ID from the Noun Project (https://thenounproject.com/term/mail/867234/)
 - email.png

Mail server Mail Server by SBTS from the Noun Project (https://thenounproject.com/term/mail-server/1236869/)
 - email_server.png

Reader by Richa from the Noun Project
 - email_recipient.png

Delete by Kavya from the Noun Project (https://thenounproject.com/term/delete/860236/)
 - delete.png

instructions by Prettycons from the Noun Project (https://thenounproject.com/term/instructions/2081362/)
 - manifest.png

Fence by P Thanga Vignesh from the Noun Project (https://thenounproject.com/term/fence/1010653/)
 - fence.png

uninterruptible power supply by Denis Shumaylov from the Noun Project (https://thenounproject.com/term/uninterruptible-power-supply/1201263/)
 - ups.png

operation by Adrien Coquet from the Noun Project (https://thenounproject.com/term/operation/2998606/)
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service by Gem Designs from the Noun Project (https://thenounproject.com/term/service/2569069/)
 - manage_file.png