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Use: netstat -tlnp | grep port

Example:
[root@trioxin2 jhopkins]# netstat -tlnp | grep 80
tcp 0 0 :::80 :::* LISTEN 4246/httpd

The above example reveals that the httpd process with a PID of 4246 is running on port 80.

To verify, you can run the ps command and grep for the application name or PID:
[root@trioxin2 jhopkins]# ps -ef | grep 4246
root 4246 1 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4249 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4250 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4251 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4252 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4253 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4254 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4255 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd
apache 4256 4246 0 13:35 ? 00:00:00 /usr/sbin/httpd

ERROR: Firmware file “b43/ucode5.fw” not found or load failed.

Ignore drivers in /lib/firmware/b43-open and perform the following:

1. yum install b43-fwcutter wget
2. wget downloads.openwrt.org/sources/broadcom-wl-4.150.10.5.tar.bz2
3. tar xjf broadcom-wl-4.150.10.5.tar.bz2
4. cd broadcom-wl-4.150.10.5/driver
5. b43-fwcutter -w /lib/firmware/ wl_apsta_mimo.o
to install all firmware into /lib/firmware/b43
6. reboot

HP Mini 110 Laptop should boot and come up with wireless functioning.

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f4:43:2f:a3:93:95 = new MAC

# ifconfig eth0 down
# ifconfig eth0 hw ether f4:43:2f:a3:93:95
# ifconfig eth0 up

From a Linux BASH command line:
openssl rand -hex 6 | sed 's/\(..\)/\1:/g; s/.$//'

Example:
[neo@trinity ~]$ openssl rand -hex 6 | sed 's/\(..\)/\1:/g; s/.$//'
28:97:1c:70:73:4d

Give a man a fish; you have fed him for today. Teach a man to fish; and if he doesn’t beat you with the pole, he will resent you for a lifetime.