IBus means Intelligent Input Bus. It is an open source input framework for Linux/Unix OS.

 $ dnf install ibus\*

 $ sudo apt-get install ibus-gtk ibus-qt4 ibus-pinyin
 $ im-switch -s ibus
or
 $ im-config -s ibus
 Logout and re-login

• For example, when you want ibus-pinyin,

 $ emerge -av ibus-pinyin

• When you want ibus-table,

 $ emerge -av ibus-table

• When you want ibus-anthy,

 $ emerge -av ibus-anthy

• If you want use git ebuilds, please add gentoo-china overlay, which includes 9999 ebuild for ibus, ibus-pinyin, ibus-table, ibus-anthy, and ibus-chewing.

 $ emerge -av layman && layman -a gentoo-china

• To use the 9999 ebuild you need to accept the ** keyword for specific packages. For instance, if we want to emerge the ibus-9999, we need to accept the ** for ibus, then:

 $ echo "app-i18n/ibus **" >> /etc/portage/package.keywords
 $ emerge -av ibus

• For more detail about the keywords masking, please refer to the handbook of gentoo.

 $ sudo pacman -S ibus

 $sudo zypper in ibus-libpinyin ibus-gtk3 ibus-gtk ibus-qt

for GNOME, Settings -> Region& Language -> Input Sources -> click "+" -> select Chinese ->Intelligent Pinyin

Please read install guide for users or developer guide for developers

 $ /usr/bin/ibus-daemon --xim &
 $ /usr/bin/ibus-setup

 # gtk application
 $ GTK_IM_MODULE=ibus gedit
 # kde application
 $ QT_IM_MODULE=ibus kwrite
 # old X application
 $ XMODIFIERS="@im=ibus" xterm