Useful Commands:

time - time a command

azure 64% time monte_pi
Enter the number of iterations used to estimate pi: 10000
# of trials= 10000, estimate of pi is 3.1512
0.012u 0.015s 0:02.06 0.9% 0+0k 0+0io 2pf+0w

ps - print information about active processes

azure 76% ps
        PID TTY     TIME CMD
       1174 ttyq9   0:01 tcsh 
       7325 ttyq9   0:00 more 
       7326 ttyq9   0:00 man 
       7327 ttyq9   0:00 man 
       7346 ttyq9   0:00 ul 
       7352 ttyq9   0:00 ps 
       7360 ttyq9   0:02 monte_pi 

w - who is on and what they are doing

delta 3% w
  8:59am  up 29 days, 23:19,  8 users,  load average: 5.06, 5.01, 5.00

User     tty from            login@   idle   JCPU   PCPU  what
operator d1                 15Sep99 23days                -csh
dmitriip q2  exos           Fri 5pm  14:34 174:11      1  vi initest.m
sas      q4  azure           8:50am                       w
jwallace q5  poohsticks     Fri 8am  2days                tcsh
jwallace q7  poohsticks     17Sep99  15:54     11         xterm -fn term14 -bg 
dmitriip q11 exos           Fri 5pm  17:00   3:26         xpsview aaa.ps
dmitriip q12 exos           Fri 6pm  17:03   7:43   7:43  /afs/northstar.dartmo
djewell  q13 mingus         Thu 2pm  18:23                -tcsh

uptime -show how long the system has been up and the average # of jobs in the queue

azure 79% uptime
8:50am up 29 days, 23:11, 8 users, load average: 5.12, 5.05, 5.00

top - display and update information about the top cpu processes

delta 5% top
IRIX64 delta 6.4 02121744 IP27 Load[4.16,4.07,4.01] 15:08:04   87 procs

    user   pid  pgrp   %cpu proc  pri  size   rss    time  command  
      
  zctang 13903 13716  98.76    2    8  7998  6691  233:29  adf
  zctang  2069  2365  98.56    0    8  7236  5788   39:05  adf
 robertd 13082 13054  98.42    1    8 18537  3452 4046:00  l703.exe
 robertd  8716  8737  94.58    *    8 18545  8659 1249:23  l1002.exe
     sas  2956  2956   0.49    3   20   112    74    0:01  top
dmitriip  3488  3488   0.09    *   18  2511  1193    6:42  matlab
    root   824   824   0.05    *   20   171    82   23:25  mediad
    root   936   936   0.03    *   20  1549  1442   80:28  dsmc  
jwallace  3919  3919   0.02    *   20   222   126    3:06  xload
    root   387   655   0.01    *   20   172    97    0:00  sshd.1.2.20
    root   826   303   0.01    *   20   149    60    2:59  fam 
 eugened  4842  4842   0.00    *   20   122    81    0:32  elmd
    root   272     0   0.00    *  +67     0     0    0:35  nfsd  
    root   268     0   0.00    *  +67     0     0    0:34  nfsd
    root   270     0   0.00    *  +67     0     0    0:34  nfsd
    root   271     0   0.00    *  +67     0     0    0:35  nfsd