## 18.2. Overview of Commands

SCCS commands fall into several categories.

### 18.2.1. Basic Setup and Editing

`admin` | Create new SCCS files and change their parameters.
`get` | Retrieve versions of SCCS files.
`delta` | Create a new version of an SCCS file (i.e., append a new delta).
`unget` | Cancel a `get` operation; don't create a new delta.

### 18.2.2. Fixing Deltas

`cdc` | Change the comment associated with a delta.
`comb` | Combine consecutive deltas into a single delta.
`rmdel` | Remove an accidental delta from an SCCS file.

### 18.2.3. Information

`help` | Print a command synopsis or clarify diagnostic messages.
`prs` | Print portions of SCCS files in a specified format.
`prt` | Format and print the contents of one or more SCCS files. Solaris only.
`sact` | Show editing activity on SCCS files.
`what` | Search for all occurrences of the pattern `get` substitutes for `%Z%`, and print the following text.

### 18.2.4. Comparing Files

`sccsdiff` | Show the differences between any two SCCS files.
`val` | Validate an SCCS file.

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