How do I stop and re-start an analysis job in ABAQUS?

Input file for the first run dynam.inp Include the line 

*RESTART, WRITE, FREQ=1

in the second step of this input file and this will write the results of every increment (FREQ = 1) to the re-start file. 
The job is run from the command line as follows : 

abaqus j=dynam

In this example the 2nd step is not completed. 
Lets assume that in the re-started run the analysis is to be continued from the end 10th increment of the second step. 
This is done by including the following line after the *HEADING statement. 

*RESTART, READ, STEP=2, INCREMENT=1, END STEP, WRITE

Failing to include the END STEP parameter would result in the re-started run repeating the second step exactly and failing to complete in the same way as the first run. 
Note that since this is a re-start run all the model data part of the input (F.E.Mesh data material properties etc) is omitted. The next statement after the *RESTART statement consists of a *STEP statement. 
Input file for the re-started run dynamr.inp 
The job is submitted from the command line as follows : 
abaqus oldjob=dynam j=dynamr 
The following extract taken from dynamr.dat shows that the results are read from the restart file up to the 10th increment and the analysis continuing with the next step (STEP 3).

  *HEADING
           BISHOP AND DRUCKER -- SMALL DISPLACEMENT ANALYSIS  B21        

          STEP    1  INCREMENT    1  HAS BEEN FOUND ON THE RESTART FILE

          STEP    2  INCREMENT    1  HAS BEEN FOUND ON THE RESTART FILE

          STEP    2  INCREMENT    2  HAS BEEN FOUND ON THE RESTART FILE
....

          STEP    2  INCREMENT    8  HAS BEEN FOUND ON THE RESTART FILE

          STEP    2  INCREMENT    9  HAS BEEN FOUND ON THE RESTART FILE

          STEP    2  INCREMENT   10  HAS BEEN FOUND ON THE RESTART FILE

The analysis continuing wth the next step (STEP 3). Following is the extract from the status file : dynamr.sta

 Abaqus/Standard 6.9-1                  DATE 01-Sep-2009 TIME 15:31:01
 SUMMARY OF JOB INFORMATION:
 MONITOR NODE:      11  DOF:  2
 STEP  INC ATT SEVERE EQUIL TOTAL  TOTAL      STEP       INC OF       DOF    IF
               DISCON ITERS ITERS  TIME/    TIME/LPF    TIME/LPF    MONITOR RIKS
               ITERS               FREQ
   3     1   1     0     1     1  1.11       0.0100     0.01000     19.3     
   3     2   1     0     1     1  1.12       0.0200     0.01000     10.1     
   3     3   1     0     1     1  1.13       0.0300     0.01000     0.116    
   3     4   1     0     1     1  1.14       0.0400     0.01000    -10.7     
   3     5   1     0     1     1  1.15       0.0500     0.01000    -20.5     
   3     6   1     0     1     1  1.16       0.0600     0.01000    -26.7     
   3     7   1     0     1     1  1.17       0.0700     0.01000    -29.3     
.....
   3    97   1     0     1     1  2.07       0.970      0.01000    -11.6     
   3    98   1     0     1     1  2.08       0.980      0.01000    -1.12     
   3    99   1     0     1     1  2.09       0.990      0.01000     9.46     
   3   100   1     0     1     1  2.10       1.00       0.01000     18.8     
                          
 THE ANALYSIS HAS COMPLETED SUCCESSFULLY

If the ODB files from the first run and the re-started run needs to be combined into a single ODB file for post-processing purposes, this is achieved by typing the following line from the command line : 
Execution procedure for joining output database (.odb) files from restarted analyses 
abaqus restartjoin originalodb=odb-file-name restartodb=odb-file-name [copyoriginal].