Octopus Octopus - 6 months ago 10
Node.js Question

How do I release port 80 on a beaglebone so I can use it?

I have a beaglebone on which I have configured lighttpd to run. Currently I have it running on port 8080 and it works fine. Except I really want to use it on port 80. Unfortunately it won't start on port 80 because it fails and reports that the port is already in use. When I access the beaglebone via HTTP on port 80, of course I get the beaglebone 101 screen.

This page suggests that I run

systemctl disable bone101.service
but that service does not even exist on my version of Angstrom. I am using the Angstrom img I got from here, which is
Angstrom-Cloud9-IDE-GNOME-eglibc-ipk-v2012.12-beaglebone-2013.04.13.img.xz
.

I am currently running with all of the following disabled:

systemctl disable cloud9.service
systemctl disable gateone.service
systemctl disable bonescript.service
systemctl disable bonescript-autorun.service
systemctl disable avahi-daemon.service
systemctl disable gdm.service # this disables the Gnome desktop which is maybe irrelevant here, but saves a ton of memory


But I still get the problem on port 80.

I know that node.js is what's serving up the content, but even when ps aux shows that node.js is not running (I can kill it), it seems that accessing the port once again invokes node.js.

How can I disable port 80 once and for all so I can free it up for use by lighttpd?

Here is the complete output from ps aux:

root 1 0.2 1.0 4820 2684 ? Ss 17:58 0:01 /sbin/init run_hardware_tests
root 2 0.0 0.0 0 0 ? S 17:58 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? S 17:58 0:00 [ksoftirqd/0]
root 5 0.0 0.0 0 0 ? S< 17:58 0:00 [kworker/0:0H]
root 7 0.0 0.0 0 0 ? S< 17:58 0:00 [kworker/u:0H]
root 8 0.0 0.0 0 0 ? S 17:58 0:00 [migration/0]
root 9 0.0 0.0 0 0 ? S 17:58 0:00 [rcu_bh]
root 10 0.0 0.0 0 0 ? S 17:58 0:00 [rcu_sched]
root 11 0.0 0.0 0 0 ? S 17:58 0:00 [watchdog/0]
root 12 0.0 0.0 0 0 ? S< 17:58 0:00 [khelper]
root 13 0.0 0.0 0 0 ? S 17:58 0:00 [kdevtmpfs]
root 14 0.0 0.0 0 0 ? S< 17:58 0:00 [netns]
root 15 0.0 0.0 0 0 ? S 17:58 0:00 [kworker/0:1]
root 16 0.0 0.0 0 0 ? S 17:58 0:00 [bdi-default]
root 17 0.0 0.0 0 0 ? S< 17:58 0:00 [kintegrityd]
root 18 0.0 0.0 0 0 ? S< 17:58 0:00 [kblockd]
root 19 0.0 0.0 0 0 ? S 17:58 0:00 [khubd]
root 20 0.0 0.0 0 0 ? S 17:58 0:00 [irq/86-44e0b000]
root 21 0.0 0.0 0 0 ? S 17:58 0:00 [kworker/u:1]
root 26 0.0 0.0 0 0 ? S 17:58 0:00 [irq/46-4819c000]
root 35 0.0 0.0 0 0 ? S< 17:58 0:00 [rpciod]
root 37 0.0 0.0 0 0 ? S 17:58 0:00 [khungtaskd]
root 38 0.0 0.0 0 0 ? S 17:58 0:00 [kswapd0]
root 39 0.0 0.0 0 0 ? S 17:58 0:00 [fsnotify_mark]
root 40 0.0 0.0 0 0 ? S< 17:58 0:00 [nfsiod]
root 41 0.0 0.0 0 0 ? S< 17:58 0:00 [crypto]
root 44 0.0 0.0 0 0 ? S< 17:58 0:00 [pencrypt]
root 45 0.0 0.0 0 0 ? S< 17:58 0:00 [pdecrypt]
root 52 0.0 0.0 0 0 ? S< 17:58 0:00 [OMAP UART0]
root 54 0.0 0.0 0 0 ? S< 17:58 0:00 [kpsmoused]
root 66 0.0 0.0 0 0 ? S< 17:58 0:00 [deferwq]
root 67 0.0 0.0 0 0 ? S 17:58 0:00 [kworker/u:2]
root 68 0.1 0.0 0 0 ? D 17:58 0:00 [mmcqd/0]
root 71 0.0 0.0 0 0 ? S< 17:58 0:00 [kworker/0:1H]
root 72 0.0 0.0 0 0 ? S 17:58 0:00 [jbd2/mmcblk0p2-]
root 73 0.0 0.0 0 0 ? S< 17:58 0:00 [ext4-dio-unwrit]
root 81 0.6 2.0 260668 5212 ? Ss 17:58 0:06 /lib/systemd/systemd-journald
root 83 0.0 0.6 3732 1668 ? Ss 17:58 0:00 /lib/systemd/systemd-udevd
root 86 0.0 0.0 0 0 ? S 17:58 0:00 [kworker/0:2]
root 93 0.0 0.0 0 0 ? S< 17:58 0:00 [krfcommd]
root 164 0.0 0.4 3008 1196 ? Ss 17:58 0:00 /usr/sbin/crond -n
root 166 0.0 0.3 2464 916 ? Ss 17:58 0:00 /usr/sbin/lighttpd -D -f /etc/lighttpd.conf
root 167 0.0 0.8 5524 2260 ? Ss 17:58 0:00 /usr/sbin/connmand -n
root 169 0.0 0.5 3012 1332 ? Ss 17:58 0:00 /bin/sh /usr/bin/g-ether-load.sh
root 173 0.0 0.5 3056 1396 ? Ss 17:58 0:00 /bin/sh /usr/bin/mysqld_safe
root 175 0.0 0.4 2976 1156 ? Ss 17:58 0:00 /lib/systemd/systemd-logind
999 185 0.0 0.5 2840 1380 ? Ss 17:58 0:00 /usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation
root 191 0.0 0.2 1992 724 tty1 Ss+ 17:58 0:00 /sbin/agetty --noclear tty1 38400 linux
root 234 0.0 0.2 1992 712 ttyO0 Ss+ 17:58 0:00 /sbin/agetty -s ttyO0 115200
root 335 0.0 0.0 0 0 ? S 17:58 0:00 [flush-179:0]
root 394 0.0 0.0 0 0 ? S 17:58 0:00 [file-storage]
root 407 0.0 0.2 2152 688 ? S 17:58 0:00 /usr/sbin/udhcpd -f -S /etc/udhcpd.conf
mysql 448 0.0 1.6 26604 4064 ? Sl 17:59 0:00 /usr/libexec/mysqld --basedir=/usr --datadir=/var/mysql --user=mysql --log-error=/var/log/mysqld.err --pid-file=/var/lib/mysql/mysqld.p
root 479 0.0 0.4 3564 1216 ? Ss 17:59 0:00 /usr/bin/ntpd -p /run/ntpd.pid
root 491 0.1 0.5 3028 1320 ? Ss 18:03 0:00 /usr/sbin/dropbear -i -r /etc/dropbear/dropbear_rsa_host_key -p 22
root 492 0.0 0.6 3164 1688 pts/0 Ss 18:03 0:00 -sh
root 508 0.0 0.0 0 0 ? S 18:08 0:00 [kworker/0:0]


Also, the
/etc/xinetd.conf
file is pretty barren:

# Simple configuration file for xinetd
#
# Some defaults, and include /etc/xinetd.d/

defaults
{


}

includedir /etc/xinetd.d


And the
/etc/xinetd.d
folder is empty.

I've also tried using
netstat
, but it fails to provide the -p switch on the beaglebone for some reason, so I don't get any information about which process is responsible.

The best output I can get from netstat is with
netstat -nl | grep tcp
which gives:

tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN
tcp 0 0 :::53 :::* LISTEN


netstat -p
says
invalid option -- 'p'
,

Answer

I found the solution at last. The secret is to also disable the socket as well as the service.

systemctl disable bonescript.service              
systemctl disable bonescript.socket
systemctl disable bonescript-autorun.service

And now I can use port 80 for lighttpd.

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