root@machine [~] # apt-cache show xlockmore Package: xlockmore Status: deinstall ok config-files Priority: extra Section: x11 Installed-Size: 384 Maintainer: Ubuntu Developers Architecture: amd64 Version: 1:5.31-1 Config-Version: 1:5.31-1 Replaces: xlockmore-gl Depends: libc6 (>= 2.7), libgcc1 (>= 1:4.1.1), libice6 (>= 1:1.0.0), libpam0g (>= 0.99.7.1), libsm6, libstdc++6 (>= 4.1.1), libx11-6, libxext6, libxmu6 Recommends: libpam-modules Suggests: fortune Conflicts: xlockmore-gl Conffiles: /etc/pam.d/xlock 6b4e7f1dfa32e1b0360e599ec705771c /etc/X11/Xresources/xlockmore 39b7a75edf58b0ef141931a13c604294 /etc/xlock.staff 52120290021671818c29560256b499f2 /etc/pam.d/xlock 6b4e7f1dfa32e1b0360e599ec705771c /etc/X11/Xresources/xlockmore 39b7a75edf58b0ef141931a13c604294 /etc/xlock.staff 52120290021671818c29560256b499f2 Description: Lock X11 display until password is entered. xlock locks the X server till the user enters his/her password at the keyboard. While xlock is running, all new server connections are refused. The mouse cursor is turned off. The screen is blanked and a changing pattern is put on the screen. If a key or a mouse button is pressed then the user is prompted for the password of the user who started xlock. . This version is built with only blank mode, the companion package xlockmore-gl contains them. This is the only difference between the two packages. Description-md5: 6b3503d02a46774626dbce31df24c182 Original-Maintainer: Michael Stone root@machine [~] # apt-cache search xlockmore | grep xlock root@machine [~] [1] # apt-get install xlockmore Reading package lists... Done Building dependency tree Reading state information... Done Package xlockmore is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'xlockmore' has no installation candidate root@machine [~] [100] #