To prepare your development view for a rebase operation using the command line

Before you start a rebase operation, check in all files and directories in your development view. You cannot start a rebase operation from a view that contains checkouts.

From your development view, enter cleartool lscheckout with these options:
```
cleartool lscheckout -cview -me -avobs
```
The lscheckout command produces a list of file or directory versions checked out to your development view and indicates which activity each checked-out version belongs to.

For more information, see the lscheckout reference page.
To see which changes are in a checked-out version:
- To see the differences between the previously checked-in version and the current version, type this command:
```
cleartool diff -predecessor filename
```
- To see checkin comments, type this command:
```
cleartool lshistory filename
```
Perform one of the following actions:
- To write to the VOB the changes for a given file, check it in. Type this command:
```
cleartool checkin filename
```
- To undo your changes for a file, cancel its checkout. Type this command:
```
cleartool uncheckout filename
```
  During the cancel checkout operation, you can choose to save your changes in a view-private file.