Save and close all open applications.

Use the Ctrl-Alt-Backspace shortcut keys to restart GNOME.

If Ctrl-Alt-Backspace is disabled, type

sudo /etc/init.d/gdm restart

(See How do I disable the Ctrl-Alt-Backspace shortcut keys from restarting X? to disable Ctrl-Alt-Backspace.)

Make sure the universe repository is enabled. (See How do I add Universe and Multiverse?)

Install the numlockx package with Synaptic (See How do I use Synaptic to install packages?)

Make a backup copy of your existing /etc/X11/gdm/Init/Default file.

sudo cp /etc/X11/gdm/Init/Default /etc/X11/gdm/Init/Default_backup

Open /etc/X11/gdm/Init/Default for editing.

sudo gedit /etc/X11/gdm/Init/Default

Find this line (It should be the last line in the file).

exit 0

Add the following lines above the "exit 0" line.

if [ -x /usr/bin/numlockx ]; then
/usr/bin/numlockx on
fi
						

Save the edited file. (See sample/Default_numlockx for an example.)

Choose System->Preferences->Sessions.

Click on the Startup Programs tab.

Use the Add, Edit, and Delete buttons to manage programs to run at startup.

Use the Ctrl-Alt-F1 shortcut keys to switch to the first console.

To switch back to Desktop mode, use the Ctrl-Alt-F7 shorcut keys.

Make a backup copy of your existing /etc/X11/xorg.conf file.

sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf_backup

Open /etc/X11/xorg.conf for editing.

sudo gedit /etc/X11/xorg.conf

Add the following lines to the end of the file:

Section	"ServerFlags"
Option	"DontZap"	"yes"
EndSection

Save the edited file. (See sample/xorg.conf_disablectrlaltbackspacegnome for an example.)

The change will take effect the next time you log in to GNOME. If you want the change to take effect immediately, restart GNOME manually. (See How do I restart GNOME without rebooting the computer?)

In Nautilus, choose Edit->Preferences.

Click on the Behaviour tab.

Unselect the Always open in browser windows check box.

Close and reopen Nautilus.

In Nautilus, use the Ctrl-H shortcut keys to toggle hidden files and folders on and off.

To permanently show all hidden files and folders, choose Edit->Preferences.

Click on the Views tab.

Select the Show hidden and backup files check box.

Start a new desktop configuration file in the /usr/share/applications directory.

sudo gedit /usr/share/applications/Nautilus-root.desktop

A blank file called Nautilus-root.desktop opens in gedit.

Add the following lines to the new file:

[Desktop Entry]
Name=File Browser (Root)
Comment=Browse the filesystem with the file manager
Exec=gksudo "nautilus --browser %U"
Icon=file-manager
Terminal=false
Type=Application
Categories=Application;System;

Save the file and close gedit. (See sample/Nautilus-root.desktop_browsefilesfoldersasrootnautilus for an example.)

To start Nautilus as the root user, choose Applications->System Tools->File Browser (Root)

Make sure the Nautilus Location Bar is open. Toggle the bar on and off with View->Location Bar

In the Location Bar, enter the following:

For SSH, use:

ssh://[email protected]

For FTP, use:

ftp://[email protected]

For SFTP, use:

sftp://[email protected]

Replace username with your username and replace everything after the @ symbol with the server's address. You will be prompted for a password if needed. If there is no username (anonymous) omit the username and the @ symbol.

Alternatively, to specify your password manually, change one of the above like so:

ftp://username:[email protected]

Make sure the universe and multiverse repositories are enabled. (See How do I add Universe and Multiverse?)

Install the gtweakui package with Synaptic (See How do I use Synaptic to install packages?)

After gTweakUI is installed, choose System->Preferences->gTweakUI - Nautilus.

Select the Show computer icon, Show home icon, and Show trash icon check boxes. The changes take effect immediately.

In Nautilus, right click on the file and choose Properties from the menu that appears. The Properties dialog opens.

Click on the Open With tab. A list of applications appears.

Select the default application you want for the file type. If the application is not on the list, use the Add button to add the application to the list.

To install Thunderbird, see How do I install the Thunderbird email client?

Choose System->Preferences->Preferred Applications.

Click on the Mail Reader tab, and select the Custom option.

In the Command text box, type mozilla-thunderbird %s, then close the dialog.

gedit $HOME/.gnome2/nautilus-scripts/Open\ as\ root

Insert the following lines into the new file

for uri in $NAUTILUS_SCRIPT_SELECTED_URIS; do
gnome-sudo "gnome-open $uri" &
done

Save the edited file (sample/Open-as-root_openfilesasrootviarightclick)

chmod +x $HOME/.gnome2/nautilus-scripts/Open\ as\ root

Right click on the file and Scripts->Open as root

Start a Terminal session, select: Applications->System Tools->Terminal from the desktop menu system.

Edit->Current Profile... .Select the General tab. Uncheck the Terminal bell checkbox.

Applications->Internet->Firefox Web Browser

In the Navigation toolbar URL field enter about:config .

Use the Filter field to change the following parameters:

Restart Mozilla Firefox

Applications->Internet->Firefox Web Browser

Mozilla Firefox

Address Bar -> about:config
Filter: -> accessibility.typeaheadfind.enablesound ->
false

Restart Mozilla Firefox

wget -c https://frankandjacq.com/ubuntuguide/mozilla-firefox.png
wget -c https://frankandjacq.com/ubuntuguide/document.png
chmod 644 mozilla-firefox.png
chmod 644 document.png
sudo dpkg-divert --rename /usr/share/pixmaps/mozilla-firefox.png
sudo dpkg-divert --rename /usr/share/pixmaps/mozilla-firefox.xpm
sudo dpkg-divert --rename /usr/lib/mozilla-firefox/icons/default.xpm
sudo dpkg-divert --rename /usr/lib/mozilla-firefox/icons/document.png
sudo dpkg-divert --rename /usr/lib/mozilla-firefox/chrome/icons/default/default.xpm
sudo cp mozilla-firefox.png /usr/share/pixmaps/mozilla-firefox.png
sudo cp mozilla-firefox.png /usr/share/pixmaps/mozilla-firefox.xpm
sudo cp mozilla-firefox.png /usr/lib/mozilla-firefox/icons/default.xpm
sudo cp document.png /usr/lib/mozilla-firefox/icons/document.png
sudo cp mozilla-firefox.png /usr/lib/mozilla-firefox/chrome/icons/default/default.xpm

Read How do I restart GNOME without rebooting the computer?

wget -c https://frankandjacq.com/ubuntuguide/mozilla-thunderbird.xpm
chmod 644 mozilla-thunderbird.xpm
sudo dpkg-divert --rename /usr/share/pixmaps/mozilla-thunderbird.xpm
sudo dpkg-divert --rename /usr/share/pixmaps/mozilla-thunderbird-menu.xpm
sudo dpkg-divert --rename /usr/share/pixmaps/mozilla-thunderbird-pm-menu.xpm
sudo dpkg-divert --rename /usr/lib/mozilla-thunderbird/chrome/icons/default/mozilla-thunderbird.xpm
sudo dpkg-divert --rename /usr/lib/mozilla-thunderbird/chrome/icons/default/messengerWindow16.xpm
sudo dpkg-divert --rename /usr/lib/mozilla-thunderbird/chrome/icons/default/messengerWindow.xpm
sudo dpkg-divert --rename /usr/lib/mozilla-thunderbird/chrome/icons/default/default.xpm
sudo cp mozilla-thunderbird.xpm /usr/share/pixmaps/mozilla-thunderbird.xpm
sudo cp mozilla-thunderbird.xpm /usr/share/pixmaps/mozilla-thunderbird-menu.xpm
sudo cp mozilla-thunderbird.xpm /usr/share/pixmaps/mozilla-thunderbird-pm-menu.xpm
sudo cp mozilla-thunderbird.xpm /usr/lib/mozilla-thunderbird/chrome/icons/default/mozilla-thunderbird.xpm
sudo cp mozilla-thunderbird.xpm /usr/lib/mozilla-thunderbird/chrome/icons/default/messengerWindow16.xpm
sudo cp mozilla-thunderbird.xpm /usr/lib/mozilla-thunderbird/chrome/icons/default/messengerWindow.xpm
sudo cp mozilla-thunderbird.xpm /usr/lib/mozilla-thunderbird/chrome/icons/default/default.xpm

Read How do I restart GNOME without rebooting the computer?

To install .deb file

sudo dpkg -i package_file.deb

To uninstall .deb file

sudo dpkg -r package_name

sudo alien package_file.rpm

wget -c https://frankandjacq.com/ubuntuguide/mvb_1.6.tgz
sudo tar zxvf mvb_1.6.tgz -C /usr/ 
sudo chown -R root:root /usr/mvb_1.6/ 
sudo ln -fs /usr/mvb_1.6/mvb /usr/bin/mvb mvb -h

sudo cp /etc/bash.bashrc /etc/bash.bashrc_backup
sudo gedit /etc/bash.bashrc

Append the System-wide Environment Variables at the end of file

Save the edited file

man command | col -b > file.txt

md5sum file.iso > file.iso.md5

Assuming that file.iso and file.iso.md5 are in the same folder.

md5sum -c file.iso.md5

To mount Image (ISO) file

sudo mkdir /media/iso
sudo modprobe loop 
sudo mount file.iso /media/iso/ -t iso9660 -o loop

To unmount Image (ISO) file

sudo umount /media/iso/

sudo cp /boot/grub/menu.lst /boot/grub/menu.lst_backup
sudo gedit /boot/grub/menu.lst

Find this line

...
timeout 3
...

Replace with the following line

timeout X_seconds

Save the edited file (sample/menu.list_increasedecreasetimeoutgrub)

sudo cp /boot/grub/menu.lst /boot/grub/menu.lst_backup
sudo gedit /boot/grub/menu.lst

Find this line

...
default 0
...

Replace with the following line

default X_sequence

Save the edited file (sample/menu.list_changedefaultosgrub)

Press Ctrl-C

Run Services Settings: System->Administration->Services.

Ubuntu will ask for your password, enter it.

Tick/untick the services you want running, then click OK when done.

sudo cp /etc/init.d/sysklogd /etc/init.d/sysklogd_backup
sudo gedit /etc/init.d/sysklogd

Find this section

...
stop)
log_begin_msg "Stopping system log daemon..."
start-stop-daemon --stop --quiet --oknodo --exec $binpath --pidfile $pidfile
log_end_msg $?
...

Add the following line below it

rm -fr /tmp/* /tmp/.??*

Save the edited file (sample/sysklogd_cleantmpfoldershutdown)