An Anonymous FTP Server for GSAS on Linux (RedHat 6.2) The GSAS distribution kit for RedHat Linux 6.2 on Intel 386 (and better) contains a single large file which is kept in a compressed form that is approximately 50% smaller than the original. This file needs to be transferred in binary format. There is also this "readme" file which is transferred in ascii format. GSAS Installation from ftp files: System Requirements: RedHat Linux 6.2 on Intel 386 or better. To ensure that the file structure and command files for GSAS are set up appropriately on your linux machine we have provided below an installation procedure. This installation scheme is used if you obtain the installation files by ftp file transfer from Los Alamos. 1. Set up a directory named gsas in a convenient location on your file system. (e.g. "mkdir ./gsas") Note that sufficient disk space (ca. 50Mb) to hold the all the GSAS files is needed in the file system. 2. Set the current directory to the directory created in step 1 (e.g. type "cd ./gsas"). Make a note of the full name of this directory (e.g. type "pwd"), you will need this name for step 4, below. 3. Initiate contact with the distribution machine at Los Alamos: ftp://ftp.lanl.gov/public/gsas To get general information concerning the files, type the following (without the stuff in parentheses) ascii (to set the mode of transfer) get readme.1st (to transfer the file) cd linux (to change to the linux distribution directory) get readme.linux (to transfer this readme file) (Read these files off-line; they contain general information about the versions of GSAS that are currently available as well as this instruction file. To obtain a new version of GSAS for your linux machine type the following commands:) binary (set the mode of transfer) get gsaskit.tar.gz (transfer the compressed file) quit (exit ftp)(If possible, please transfer this long file after 6:00PM Mountain time to minimize the impact on normal Los Alamos use of the Internet line.) gunzip gsaskit.tar.gz (creates gsaskit.tar from gsaskit.tar.gz) (Next restore the GSAS files from the tar file:) tar -xvzf gsaskit.tar (creates all the gsas files) (You may now delete gsaskit.tar to save ~13Mb of disk space.) rm gsaskit.tar.gz (delete file) 4. Finally you need to edit your .cshrc file to include an alias like alias gsas /usr/gsas/gsas to point at the path for the script file gsas (replace "/usr/gsas" with the location you chose for gsas (see step 2). You are now ready to use GSAS. Everything that is in the present GSAS manual will work except that the unix style file paths must be used for the exercises. For example, use /usr/gsas/example/nickel.raw for the data set name in the first exercise. (Your path will be different depending on where you put the directory gsas.) If there are any problems or questions call: Bob Von Dreele (505)-667-3630 e-mail: VONDREELE@LANL.GOV