user@computer# tail -f /var/log/messages
connect USB to SERIAL cable to your network device and to your computer. turn on network device, and locate port (mine is ttyUSB0)
—————-
[ 3201.770270] usb 7-1: new full speed USB device using uhci_hcd and address 2
[ 3201.934529] usb 7-1: configuration #1 chosen from 1 choice
[ 3202.360357] usbcore: registered new interface driver usbserial
[ 3202.360391] USB Serial support registered for generic
[ 3202.360484] usbcore: registered new interface driver usbserial_generic
[ 3202.360491] usbserial: USB Serial Driver core
[ 3202.373747] USB Serial support registered for pl2303
[ 3202.373815] pl2303 7-1:1.0: pl2303 converter detected
[ 3202.385706] usb 7-1: pl2303 converter now attached to ttyUSB0
—————-
user@computer# aptitude install minicom
user@computer# sudo minicom -s
go to Serial port setup, press A and change Serial Device (in my case it’s /dev/ttyUSB0).
now, press E and change Bps/Par/Bits to 9600 8N1.
Choose Save setup as df1, and then Exit.
voila! you’re connected 
for extra configuration, you can edit /etc/minicom/minicom.users or simply use man minicom.
user@pc:~$ dig +short SRV _xmpp-client._tcp.gmail.com
20 0 5222 talk3.l.google.com.
20 0 5222 talk4.l.google.com.
5 0 5222 talk.l.google.com.
20 0 5222 talk1.l.google.com.
20 0 5222 talk2.l.google.com.
everything seems to be ok. start kopete – add account – Jabber
basic setup -> jabber id: user@googlemail.com
Connection -> check “Use protocol encryption (SSL)” , “Allow plain-text password authentication“, “Override default server information: talk2.l.google.com Port:5223”
I’ve decided to get my CCNA CCAI (Certified Cisco Academy Instructor) certificate so I’ll be studying for next two months and try to preparemyself for fasttrack. here, You’ ll be able to see my progress and my first step is to revise my knowledge in subnetting.
Page is in croatian language (for $ divide number with 4,5) but feel free to check it out at here.
edit and copy-paste at the end of the file /etc/sysctl.conf
net.ipv4.tcp_no_metrics_save=1
net.core.rmem_default=65536
net.core.wmem_default=65536
net.core.rmem_max=52428800
net.core.wmem_max=52428800
net.ipv4.tcp_rmem = 8192 750000 52428800
net.ipv4.tcp_wmem = 8192 750000 52428800
net.ipv4.tcp_reordering=20
net.ipv4.tcp_timestamps=1
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_sack=0
net.ipv4.tcp_moderate_rcvbuf=1
net.ipv4.tcp_congestion_control = cubic
net.ipv4.tcp_adv_win_scale=9
save file, exit and reboot your machine
p.s. tnx to Popaj