About the Linux Virtual Lab
The Linux Virtual Lab is BU’s general purpose Linux interactive timesharing environment for use by the BU community, and part of BU’s larger Shared Computing Cluster (SCC). The Linux Virtual Lab login node has two 2.5 GHz ivybridge (E5-2670 V2) processors. Each processor has 10 cores and there is a total of 128 GB of memory.
Making use of the Linux Virtual Lab will generally require knowledge of the Linux operating system, which is a command-line system. Research Computing offers a free Introduction to Linux tutorial early in the Fall, Spring, and Summer. Without some background in Linux, this service will be of limited use to you unless you just wish to run a particular application such as MATLAB that has its own interface you are familiar with.
Accounts and access
To request an account on the Linux Virtual Lab, click on Get Help above or write to email@example.com. Once you have an account, you will be able to log in to
scc-lite.bu.eduwith your BU login name and Kerberos password. (Please note that sponsored Guests will be required to go through the regular Guest Account process and, in addition, provide a valid passport or other documentation to confirm your country of citizenship.)
Your use of the Linux Virtual Lab is governed by Boston University’s Conditions of Use and Policy on Computing Ethics. By using your account on the Linux Virtual Lab, as well as other University computers, you are agreeing to the terms and conditions set forth there.
Linux Virtual Lab users have access to most of the software available on the SCC. (However, note that Linux Virtual Lab access is not to be confused with SCC access for Researchers, which provides batch nodes for intensive computing and additional disk quota.)
Using an X Windows system to access the Linux Virtual Lab
About the default shell
The default shell is the Bash shell, but it can be changed to tcsh by submitting this web form (requires Kerberos authentication): https://acct.bu.edu/htbin/perl/secure_kerb/change_shell.pl
Alternatively, to change the current session only, you can manually change the shell. At a command line simply type ‘tsch’.
Information regarding the software available on the Linux Virtual Lab is provided on the Software Packages page. Much of the software currently uses Modules and more will in the future.
For some software packages, you may need to add specific directories to your execution path or correctly set particular environment variables in order to use them. This process is usually done by modifying your
.cshrc file. Please refer to the documentation on the page referenced above for the specific details. Packages which use Modules will generally handle this process automatically.
For reference, see:
Learn to use the Linux Virtual Lab
Research Computing tutorials are available, particularly at the start of each semester and the summer. The Introduction to Linux is particularly recommended as use of the Linux Virtual Lab requires some familiarity with the Linux command-line operating system.
In addition, the information for using SCC is generally applicable to use of the Linux Virtual Lab, although you will want to keep in mind that:
- When referring to the documentation, you should replace the provided examples (SCC1, SCC2, etc) with SCC-LITE.
- You should ignore references to Project Disk Space (e.g. /project, /projectnb, etc.) since these are not applicable to the Linux Virtual Lab.
- The Linux Virtual Lab does not include any batch processing nodes. Any reference to batch processing or compute nodes will not apply to Linux Virtual Lab accounts.
On the Linux Virtual Lab, each account has a 10 GB home directory that:
- is protected by Snapshots to recover accidentally deleted files,
- uses hardware RAID to protect against data loss due to disk drive failures. (See the Data Loss Protection Policies.)
- is backed up nightly for disaster recovery
To check your home directory quota, use the
quota -v login_name command.
Please note that additional disk storage space is not available for home directories. For additional temporary storage, people may use
/scratch, but not
/scratch directory is available for people who need a large amount of storage for a short period of time. Files are automatically purged after 30 days. If there is a critical shortage of scratch space, it may be necessary to purge files which are less than 30 days old. Files which have been “touched” but not modified will be treated as old and removed immediately. The scratch partitions are NOT BACKED UP and do not have Snapshots.
The IS&T Data Archiving Service is available for those who need to archive data and archives will be automatically mounted to the Linux Virtual Lab.
System messages and support
We will periodically make important announcements regarding usage policies, software and hardware upgrades, downtime, etc. It is important to read these messages on a regular basis and we provide several methods for you to do so:
- All messages are posted to the system message board, which can be viewed by running the command
msgs. By default this command will be included in your
.loginstartup file. If you modify your
.loginfile, we suggest that you continue to include the
- The system status page SCC Updates will be kept updated with information on the current status of the system and any planned downtime.
- We will also regularly send individual messages to you regarding your account status and usage. These will be sent via email to your BU account (