DAT.floater1 is available on all SGIs. This program is started by typing DAT.floater1 at the prompt in a UNIX window. The DAT.floater1 program allows you to use the DAT tape drive on floater1 (room A421) to write files and directories to a new tape or, with appropriate caution, to append files and directories to a tape. You can also read files from tape and list the "table of contents" of the tape. A 'help' option is available which describes what can and cannot be specified when reading and writing files and directories. This program can be run by any user on all SGI workstations in the Chemistry Department. The program can archive a single file, the contents of a directory, or an entire disk. Thus, each user has the opportunity to write important files to tape and remove these files from the SGI disk. A 'system backup' option exists for research SGI system administrators. For more information, type 'man tar'. To understand these scripts, type more /remote/server/bin/DAT.floater1. This is a typical C-shell script written by Marty. You can write similar scripts to perform other operations.
A similar program, DAT.nmrsg1 is also available on all SGIs to allow users to read and write DAT tapes using the tape drive on nmrsg1 (root C237). DAT.splatter, DAT.colossus, and DAT.iumsc3 are similar programs that are available ONLY on splatter, colossus, and iumsc3, respectively, for users who have accounts on those systems and want to use the tape drive on splatter, colossus, and iumsc3, respectively.
DAT.inorganic3 accesses inorganic3's DAT drive. It is 'hardwired' to perform a backup in background so you can start the backup and then logout. DAT.pooh and similar scripts on jwz1 and jwz2 also run this way, but it uses the DAT drive on nmrsg1.
Contact Marty if you need a customized DAT backup script.
Other programs exist that help you use tape drives. However, DAT.floater1 has more options, is customized for our SGI network, and (most importantly) it is the only program that the department supports at this time.
DAT tapes have a capacity of 2 GBytes, cost less than $20, and are available .t the IU Bookstore. The floater1 tape drive may be used by SGI users at any time. If you use a tape drive, please place the "WARNING!!! Drive in use!" sign (which sits in a box on the shelf above floater1) on top of the drive. Please check on the progress of the backup and remove your tape and the sign as soon as possible after completion so others may use it.
Before we move on to other options, we would like to make a recommendation and offer a bit of reassurance concerning use of the DAT backups. The recommendation is that you should always label your tape before putting it into the drive so you don't get confused and use the wrong tape in the future, possibly overwriting valuable data. The reassurance is that when your backup is complete using DAT.floater1 or the various customizations of it mentioned above it is automatically ejected from the drive so it cannot be accidentally overwritten by another user unless someone physically re-inserts the tape into the drive. This does not protect you from intentional damage, but does provide some degree of protection from accidental damage to your tape. Please take the time to verify the tape by removing some moderately-sized text file, then restore it from the tape and compare the 2 files by typing diff renamed_file file_restored_from_tape
We have recently purchased a 25/50 GByte tape backup system for backing up our UNIX systems within the department. Once that is working reliably, we plan to offer a weekly backup service option to groups who are willing to share in the cost of maintenance and support for that device.
The NMR Facility has a CD Recorder and is willing to share that on a limited basis for making more permanent backups of critical data, such as a permanent backup of a user's account when they are leaving IU and need to take their data with them. This would need to be scheduled at a time not likely to interfere with normal usage by regular users of the NMR Facility. For NMR users to backup their NMR data there is no charge except for the media required. A fee of $5 per CD will be assessed for all other usage. For additional information, contact the staff of the NMR Facility.
date show date and time df show disk space usage (by file system) in blocks (512 bytes) df -k show disk space usage (by file system) in KBytes du show disk space usage (by subdirectory) in blocks (512 bytes) du -k show disk space usage (by subdirectory) in Kbytes du -ks show disk space usage summary (lower level directories not displayed) in Kbytes finger show info about a user gr_osview show system usage dynamically and graphically history show commands recently issued in current shell last show last login of users and terminals lpq show print queue status lpstat show printer status man show syntax and usage of the indicated command man -k show list and brief description of commands related to specified topic netstat show network status nslookup show IP number and name (from DNS tables) based on lookup for either one osview show system usage dynamically in text form printenv show current environment settings ps show status of processes ps -ef show status of many more processes along with more detail about each uptime show system load and time since last boot versions show installed software including version number who show all users currently logged on whoami show user in the current shell more /var/spool/lpr/lpr.log show log of printer accessFor additional information about these or other commands, type man command_name (for example, man df) or consult your favorite UNIX book. Some systems (floater1) also have Insight installed for menu-based help on a variety of topics. Man is great if you know the command name but aren't sure how to use it, but Insight lets you find answers to less specific questions.
Keeping a 3-ring binder with notes applicable to users is highly recommended. This should contain a supply of blank account request forms, a brief description of the applications your users are likely to be running, common user-solvable problems and solutions, notes about available printers and procedures for accessing them, and a statement on how you are to be contacted with problems and questions (phone, Email, note on desk, or whatever works best for you). You may also want to create a web page with this information available for your users on-line so they can consult it even if they are logging in remotely rather than at the console.
If there is some current information you feel your users should be made aware of, UNIX has provided a very simple process for doing this. There is a file, /etc/motd.your_machine_name (/etc/motd.nmrsg1, for example), which gets displayed each time a new shell is opened. This is a good place to announce things such as application upgrades, scheduled downtimes and backups, times you will be unavailable and an alternate contact, and impending problems such as disk filling up. Unfortunately, most of us have seen enough worthless messages displayed in these areas that we no longer pay attention to them, so if you use this vehicle be sure you only include truly important messages and only for an appropriate amount of time. If you login to upgrade the OS and see a message telling you the system has just been upgraded to the previous version, you are probably leaving the messages there too long.
The following is a few more recommendations for extending the life of your equipment and making it more inviting to your users:
As we try to maintain some degree of compatibility between systems, it is essential that local System Administrators do not modify the default cshrc files in the /etc directory. Local System Administrators may choose to add features to the /etc/cshrc.local files, but should consult with eithe Marty or Ken before removing existing features or making extensive modifications. However, it would be a useful learning experience to look at those files as an example of the kinds of customization that can be done. Likewise, many applications installed on the systems are run using scripts or shell wrapper files in the /remote/server/bin directory and may be worth looking at to see how to provide customization needed for a specific application without consuming unneeded resources when the application is not running.
The desktop tool menus can be customized so applications such as pcmodel and insightII appear as icons.
The Molecular Visualization Facility Website, is a resource which provides a great deal of information about the SGIs, including the topic "where to get help" and should be consulted regularly. There is a section on System Administration as well as a link on each page to send Email to the MolViz Staff with any comments or requests for additional information.