Of late we have observed that some users have been consistently running their applications on the login nodes. This causes congestion of the login nodes and makes them very slow for issuing even small/simple such as 'cd', 'mkdir', etc. Processes running on login nodes that are consuming significant resources will be killed.
Please be considerate and do not run calculations on the login nodes. Please either specify your calculations in job scripts you then submit to compute nodes using 'qsub', or if you must run your calculations interactively for testing purposes please use 'qlogin' to obtain a compute node before you begin.