path to the homedirectory

echo ~/ #home dir
echo $SHELL # shell used
echo $TERM #terminal type
echo `/sbin/runlevel` #to see which runlevel your system is running.
run_level=`/sbin/runlevel | awk ' { print $2 } '`
The services that run at run level 3 can be obtained using chkconfig --list
/sbin/chkconfig --list| awk ' ( $5 == "3:on") { print $1 } '

Everything is fine except this command.

run_level=`/sbin/runlevel | awk ' { print $2 } '`

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Nothing found after running it.

And there is a hint.

ls /etc/rc3.d/S*

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But I am not sure.

You can look at the Startup scripts in /etc/rc3.d as well.
what is the output of your /sbin/runlevel?
Do you have something like:
N 3

I am puzzled at your hint? Is there a purpose behind it?
In any event whether you use chkconfig or ls /etc/rc3.d/S* it says what based on startup script should start at this level, it does not tell you that some of those that are configured to start do not because those services were not configured i.e. /etc/<servicename>/<servicename>.conf was not created /setup
There is no reason a user logging into a system would need that type information.

It gave me

N 5

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The hint is from a web tutorial. http://tille.garrels.be/training/bash/
I am doing a practice problem there.

[hzhao@localhost rc3.d]$ echo `/sbin/runlevel`N 5
[hzhao@localhost rc3.d]$ /sbin/chkconfig --list| awk ' ( $5 == "3:on") { print $1 } '
NetworkManager
abrtd
atd
auditd
avahi-daemon
bluetooth
cpuspeed
crond
cups
haldaemon
ip6tables
iptables
irqbalance
iscsi
iscsid
livesys
livesys-late
lvm2-monitor
mdmonitor
messagebus
netfs
portreserve
rsyslog
sendmail
udev-post
[hzhao@localhost rc3.d]$ 

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N 5 means you are running in graphical mode and if you want to check the services that start at that level, you should change the $5 in the awk with $7

Never mind, it is just a small exercise.hmm..