Change Default Terminal Windows Size

To Change the Windows Terminal Size simply by using the command:

$ sudo gedit /usr/share/vte/termcap/xterm

Find the script below

:co#80:it#8:li#24:

Change according to your desiredchange according to your desired

co:width Windows
li:high Windows

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Change Splash Screen Color Ubuntu

When we login to the ubuntu. Default color splash screen/background Orange color in accordance with ubuntu To change the splash screen/background on windows Login Simply use the command: After the show interface text editor Then find the script below

$ sudo gedit/etc/gdm/gdm.conf

Find this line

----------------------------
BackgroundColor=#dab082
GraphicalThemedColor=#dab082
----------------------------

Default splash screen is like the above for you to change them into black Living Changing the script above with:

----------------------------
BackgroundColor=#000000
GraphicalThemedColor=#000000
----------------------------

The result for the Press Ctrl+Alt+Backspace to Logout. Then Log Back Using your users and Happy Testing...!!

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Speed Up Bandwidth In Ubuntu Using Sysctl

To speed up the connection and increase the bandwidth clogged hardy can use the command:

$ sudo gedit/etc/sysctl.conf

paste the script below on the bottom

## increase TCP max buffer size setable using setsockopt()
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
## increase Linux autotuning TCP buffer limits
## min, default, and max number of bytes to use
## set max to at least 4MB, or higher if you use very high BDP paths
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
## don't cache ssthresh from previous connection
net.ipv4.tcp_no_metrics_save = 1
net.ipv4.tcp_moderate_rcvbuf = 1
## recommended to increase this for 1000 BT or higher
net.core.netdev_max_backlog = 2500
## for 10 GigE, use this, uncomment below
## net.core.netdev_max_backlog = 30000
## Turn off timestamps if you're on a gigabit or very busy network
## Having it off is one less thing the IP stack needs to work on
## net.ipv4.tcp_timestamps = 0
## disable tcp selective acknowledgements.
net.ipv4.tcp_sack = 0
##enable window scaling
net.ipv4.tcp_window_scaling = 1

To Activating script above type command

$ sudo sysctl -p

Will appear after the script below:

kernel.printk = 4 4 1 7
kernel.maps_protect = 1
fs.inotify.max_user_watches = 524288
vm.mmap_min_addr = 65536
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.all.rp_filter = 1
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
net.ipv4.tcp_no_metrics_save = 1
net.ipv4.tcp_moderate_rcvbuf = 1
net.core.netdev_max_backlog = 2500
net.ipv4.tcp_sack = 0
net.ipv4.tcp_window_scaling = 1

So the internet connection on ubuntu akan faster up to 45%

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Disable Root Password On Ubuntu

Ubuntu is one of the few Linux distributions out there that will not enable the root account.If you want to do something with root permission on the console you have to type sudo before the command.

sudo” means superuser do. “sudo” will prompt for “Password:”. Please specify user password

As you have noticed during the Ubuntu installation there was no question about the root password, as you might have been used to see during other Linux distribution installation process.Because of this your root accout is inactive.

If you want to enable root account (which is not recommended) enter the following command.

$sudo passwd root

This will prompt for a new root password and once you confirm it, you can start using the root account to login.

If you want to disable root account in ubuntu you need to lock the root account by using the following command

$sudo passwd -l root

If you want to work on a root console you’d better use the following command

$sudo -i

Hapyy Testing...!!

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Install Modem ZTE MF620 IM2 Unlimited On ubuntu 7.10, 8.04 and 8.10

Download Package usb_modeswitch-0.9.4.tar.bz2 from

$ wget http://www.draisberghof.de/usb_modeswitch/usb_modeswitch-0.9.4.tar.bz2

Then extract and install

$ tar jxvf usb_modeswitch-0.9.4.tar.bz2
$ cd usb_modeswitch-0.9.4.tar.bz2
$ sudo cp usb_modeswitch /usr/sbin
$ sudo cp usb_modeswitch.conf /etc

Create new file 15-zte-mf620.rules with command :

$ sudo gedit /etc/udev/rules.d/15-zte-mf620.rules

#--------------------------------------------------
ACTION!="add", GOTO="ZTE_End"

# Is this the ZeroCD device?
SUBSYSTEM=="usb", SYSFS{idProduct}=="2000",
SYSFS{idVendor}=="19d2", GOTO="ZTE_ZeroCD"

# Is this the actual modem?
SUBSYSTEM=="usb", SYSFS{idProduct}=="0001",
SYSFS{idVendor}=="19d2", GOTO="ZTE_Modem"


LABEL="ZTE_ZeroCD"

# This is the ZeroCD part of the card, remove
# the usb_storage kernel module so
# it does not get treated like a storage device
RUN+="/usr/sbin/usb_modeswitch -d 1 -v 0x19d2 -p 0x2000 -V 0x19d2 -P 0x0001"


LABEL="ZTE_Modem"

# This is the Modem part of the card, let's
# load usbserial with the correct vendor
# and product ID's so we get our usb serial devices
RUN+="/sbin/modprobe usbserial vendor=0x19d2 product=0x0001",

# Make users belonging to the dialout group
# able to use the usb serial devices.
MODE="660", GROUP="dialout"


LABEL="ZTE_End"
#-------------------- eof ---------------

Connections for Using wvdial type the command:

$ sudo gedit/etc/wvdial.conf

[Dialer Defaults]
Modem = /dev/ttyUSB0
Baud = 3600000
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2
Init3 = AT+CGDCONT=1,"IP","indosatm2"
Area Code =
Phone = *99#
Username = username_anda
Password = password_anda
Ask Password = 0
Dial Command = ATDT
Stupid Mode = 1
Compuserve = 0
Force Address =
Idle Seconds = 0
DialMessage1 =
DialMessage2 =
ISDN = 0
Auto DNS = 1

to connect to the internet directly use the command:

$ wvdial

Then wait, if not connected repeat the above step until the correct

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