.TH headon "" "" "/rdb Command"
.PC "Add an /rdb header to a table"
\fBheadon  < \fItable\fR
.PP
.II "table^add head"
.II "add head to table"
The command
.B headon
appends an
.B /rdb
header onto
.IR table .
Tables have a two-line column head.
When you have a table without an
.B /rdb
header, perhaps created by another program, you can add a head to it.
You can also do this in a pipe and send the new table to other
.B /rdb
commands for processing.
.SH Example
If you want to treat the file
.B /etc/passwd
as a table for
.B /rdb
command processing, use
.BR headon ,
as follows:
.DM
	tr ':' '      ' < /etc/passwd | headon | justify
.DE
.PP
Note the use of the COHERENT command
.B tr
to translate a colon `:' into a tab character;
and the use of the
.B /rdb
command
.B justify
to align the columns.
This produces something like the following:
.DM
1       2                 3       4     5               6            
------  -------------   ---     ---     --------------- -------------
root    dVAYxSsJy10Fg     0       3     Super User      /            
daemon                    1      12     background      /            
bin     rVOhF49RpZXEY     2       2     binary programs /bin         
uucp                      5       1     UUCP            /usr/lib/uucp
lp                       71       2     Line Printer    /usr/spool/lp
guest                   100     100     Guest User      /usr/guest   
rod                       0       0     Rod Manis       /usr/rod     
.DE
.PP
Be sure the first line of the table has no blank fields or
.B headon
counts the wrong number of fields.
.SH "See Also"
.B
headoff,
insertdash,
justify,
rmblank
.R
.br
COHERENT Lexicon:
.B
passwd,
tr
.R
.SO headon