Below is a sample CLP executable prompt-mode session. A small problem is loaded and solved under various conditions with the primal and dual simplex methods. Note the use of the allslack command; it sets the basis to all slacks and resets the solution.

    $clp
    Coin LP version 0.99.9, build Sep 14 2004
    Clp takes input from arguments ( - switches to stdin)
    Enter ? for list of commands or help
    Clp:import../Mps/Sample/p0033.mps
    At line 15 NAME          P0033
    At line 16 ROWS
    At line 34 COLUMNS
    At line 109 RHS
    At line 118 BOUNDS
    At line 152 ENDATA
    Problem P0033 has 16 rows, 33 columns and 98 elements
    Model was imported from ./../Mps/Sample/p0033.mps in 0 seconds
    Clp:primals
    Presolve 15 (-1) rows, 32 (-1) columns and 97 (-1) elements
    0  Obj 0 Primal inf 27.2175 (10) Dual inf 6.42094e+11 (32)
    32  Obj 2520.57
    Optimal - objective value 2520.57
    After Postsolve, objective 2520.57, infeasibilities - dual 0 (0), primal 0 (0)
    Optimal objective 2520.571739 - 32 iterations time 0.012, Presolve 0.01
    Clp:max
    Clp:primals
    Presolve 11 (-5) rows, 25 (-8) columns and 84 (-14) elements
    0  Obj 4807.92 Dual inf 1700.71 (15)
    End of values pass after 2 iterations
    2  Obj 4921.7 Dual inf 580.637 (5)
    9  Obj 5299.7
    Optimal - objective value 5299.7
    After Postsolve, objective 5299.7, infeasibilities - dual 643.608 (9), primal 27.0826 (10)
    Presolved model was optimal, full model needs cleaning up
    0  Obj 5299.7
    0  Obj 5299.7
    Optimal - objective value 5299.7
    Optimal objective 5299.698868 - 9 iterations time 0.022, Presolve 0.02
    Clp:allslack
    Clp:duals
    Presolve 11 (-5) rows, 25 (-8) columns and 84 (-14) elements
    0  Obj 2752 Primal inf 24.4867 (6) Dual inf 4280.55 (25)
    8  Obj 5299.7
    Optimal - objective value 5299.7
    After Postsolve, objective 5299.7, infeasibilities - dual 704.58 (8), primal 27.0792 (10)
    Presolved model was optimal, full model needs cleaning up
    0  Obj 5299.7
    0  Obj 5299.7
    Optimal - objective value 5299.7
    Optimal objective 5299.698868 - 8 iterations time 0.032, Presolve 0.01
    Clp:min
    Clp:duals
    Presolve 15 (-1) rows, 32 (-1) columns and 97 (-1) elements
    0  Obj 5299.7 Dual inf 4632.26 (28)
    16  Obj 2520.57
    Optimal - objective value 2520.57
    After Postsolve, objective 2520.57, infeasibilities - dual 2052.5 (13), primal 27.1143 (10)
    Presolved model was optimal, full model needs cleaning up
    0  Obj 2520.57
    0  Obj 2520.57
    Optimal - objective value 2520.57
    Optimal objective 2520.571739 - 16 iterations time 0.012, Presolve 0.01
    Clp:allslack
    Clp:presolve off
    Clp:primals
    0  Obj 0 Primal inf 27.2175 (10) Dual inf 6.39167e+11 (32)
    32  Obj 2520.57
    Optimal - objective value 2520.57
    Optimal objective 2520.571739 - 32 iterations time 0.002
    Clp:allslack
    Clp:maxIt 10
    maxIterations was changed from 99999999 to 10
    Clp:primals
    0  Obj 0 Primal inf 27.2175 (10) Dual inf 6.39167e+11 (32)
    Stopped - objective value 4.24664e+10
    Stopped objective 4.246637759e+10 - 10 iterations time 0.002
    Clp:quit