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I want to give node.js the ability to listen on port 80, and shutdown the computer. Initially I tried these two commands in sequence:

setcap cap_net_bind_service=+ep /usr/bin/nodejs
setcap cap_sys_boot=+ep /usr/bin/nodejs

Then my app was failing to bind to port 80. I checked with getcap:

# getcap /usr/bin/nodejs
/usr/bin/nodejs = cap_sys_boot+ep

If I run setcap again for cap_net_bind_service:

# getcap /usr/bin/nodejs
/usr/bin/nodejs = cap_net_bind_service+ep

I don't see anything in the man page http://linux.die.net/man/8/setcap about setting multiple capabilities, and try some things in desperation:

# setcap cap_net_bind_service=+ep /usr/bin/nodejs cap_sys_boot=+ep /usr/bin/nodejs
# getcap /usr/bin/nodejs /usr/bin/nodejs = cap_sys_boot+ep
# setcap cap_net_bind_service=+ep cap_sys_boot=+ep /usr/bin/nodejs
Failed to set capabilities on file `cap_sys_boot=+ep' (No such file or directory)

How do I set multiple capabilities?

14

And one last desperate syntax guess pays off:

# setcap cap_net_bind_service,cap_sys_boot=+ep /usr/bin/nodejs
# getcap /usr/bin/nodejs
/usr/bin/nodejs = cap_net_bind_service,cap_sys_boot+ep
  • please tick. You have the correct answer. – ctrl-alt-delor Apr 16 '15 at 13:39

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