谷歌发现在Ubuntu的lesstif2-dev软件包文件清单中含有此文件（点击http://packages.ubuntu.com/lucid/i386/lesstif2-dev/filelist打开链接），但发现下载后dpkg -i *.deb安装失败。
还是用这招管用：sudo apt-cache search lesstif*
libxkbfile1-dbg - X11 keyboard file manipulation library (debug package)
libxt-dev - X11 toolkit intrinsics library (development headers)
libxt-doc - X11 toolkit intrinsics library (documentation)
libxt6 - X11 toolkit intrinsics library
libxt6-dbg - X11 toolkit intrinsics library (debug package)
ddd - The Data Display Debugger, a graphical debugger frontend
libpacklib-lesstif1-dev - CERNLIB data analysis suite - core GUI library (development files)
libpacklib-lesstif1-gfortran - CERNLIB data analysis suite - core GUI library
libpacklib1-dev - CERNLIB data analysis suite - core library (development files)
libpacklib1-gfortran - CERNLIB data analysis suite - core library
libpawlib-lesstif3-dev - CERNLIB PAW library (Lesstif-dependent part - development files)
libpawlib-lesstif3-gfortran - CERNLIB PAW library (Lesstif-dependent part)
libpawlib2-dev - CERNLIB PAW library - portion without Lesstif (development files)
libpawlib2-gfortran - CERNLIB PAW library - portion without Lesstif dependencies
paw++ - Physics Analysis Workstation (Lesstif-enhanced version)
pcb-lesstif - printed circuit board (pcb) design program - LessTif interface
plan - X/Motif day planner (dynamically compiled with LessTif2)
vim-lesstif - Vi IMproved - enhanced vi editor (transitional package)
xmabacus - simulation of the ancient calculator (Motif version)
xmakemol - program for visualizing atomic and molecular systems
xmakemol-gl - program for visualizing atomic and molecular systems (OpenGL)
xmhtml1 - Motif widget for displaying HTML 3.2 (library)
xmhtml1-dev - Motif widget for displaying HTML 3.2 (development files)
xmpuzzles - collection of puzzles for X (Motif version)
xsol - Solitaire game for the X Window system
xtel - X emulator of the French Minitel
lesstif2 - OSF/Motif 2.1 implementation released under LGPL
然后直接安装libpawlib-lesstif3-dev搞定：
sudo apt-get install libpawlib-lesstif3-dev