Cisco Systems 1.0 (1) - page 232

Cisco Support Tools 1.0 User Guide How to Use the Head Utility 232
-v: Print headers giving file names.
-x: Expand tabs into the number of spaces specified by the TABS environment
variable or into 8 spaces if TABS is undefined.
-?: Display program description.
Note: If the environment variable Head exists, its value is used to establish default
options.
Note: You can override an option that was specified in the environment variable by
following the option with a minus '-' sign. For example, to turn off the -v option,
specify -v-.
Note: If the environment variable TABS exists, its value will determine the number
of spaces used to expand tabs. Otherwise, tabs are expanded to 8 spaces.
See Also
For related information, see:
About Common Utilities
How to Use the FHead Utility