From Ubuntu Terminal
1.Open terminal(Press CTRL+ALT+T or Applications->Accessories->Terminal)

2 Type the command sudo apt-get install gimp3.Wait for downloading and installation to complete.It may take few minutes.

From Ubuntu Software Center or Synaptic Package Manager(SPM)
1.Go to Ubuntu software Center or SPM and search for gimp.

2.Then click to install.

sudo apt-get remove wine
rm -rf $HOME/.wine
rm -f $HOME/.config/menus/applications-merged/wine*
rm -rf $HOME/.local/share/applications/wine
rm -f $HOME/.local/share/desktop-directories/wine*
rm -f $HOME/.local/share/icons/????_*.xpm

sudo apt-get install wine

ls -a .

The option -a will list the hidden files

.                         css               index.php
..                        detail.php        js
addedit_banner.php        FCKeditor         list_category.php
admin                     footer-grade.php  loadcategorylist.php
adv_search.php            footer.php        loadcategory.php
banner                    header.php        searchbck07.php
banner.php                hostreview.sql    search.php
bck                       htaccess          sidebar.php
category.php              .htaccess         test.php