systems.scr - A BLAST support file that enables logging in and logging out, starting filetransfer, etc. on a variety of systems.

Instructions:

1. Log in as root.
   
2. Determine location of the current systems.scr script. By default, systems.scr should be located in /usr/blast. If the BLASTDIR environment variable is set for the root user, you can determine the location of systems.scr by typing:
   
   echo $BLASTDIR
   
   Otherwise you may want to execute a find command to locate systems.scr.
   
   find / -name systems.scr -print
   
3. Get into the directory with the systems.scr file using the cd command. For example:
   
   cd /usr/blast
   
4. Make a backup copy of systems.scr using the cp command. For example:
   
   cp systems.scr systems.bak
   
5. Download the latest systems.scr file from the BLAST web site and copy it into the directory where the original systems.scr resided (the BLASTDIR directory).
   
6. Index the systems.scr file using the index command. To run the index utility:
   
   index systems.scr
   
7. It is recommended that you set permissions on systems.scr so that it is readable by all users, but only writable by the root user. Use the chmod command to set the permissions.
   
   chmod 644 systems.scr