man/man1/hist.1

.TH HIST 1
.SH NAME
hist, history \- print file names from the dump
.SH SYNOPSIS
.B hist
[
.B -vdu
] [
.B -s
.I yyyymmdd
]
.I files ...
.SH DESCRIPTION
.I Hist
prints the names, dates, and sizes of all versions of the named
.IR files ,
looking backwards in time,
stored in the dump file system.
If the file exists in the main tree, the first line of output will be its current state.
For example,
.IP
.EX
hist ~rsc/.bash_history
.EE
.PP
produces
.IP
.EX
.nf
May 19 16:11:37 EDT 2005 /home/am3/rsc/.bash_history 6175
May 18 23:32:16 EDT 2005 /dump/am/2005/0519/home/am3/rsc/.bash_history 5156
May 17 23:32:31 EDT 2005 /dump/am/2005/0518/home/am3/rsc/.bash_history 5075
May 16 07:53:47 EDT 2005 /dump/am/2005/0517/home/am3/rsc/.bash_history 5065
.fi
.EE
.PP
The
.B -v
option enables verbose debugging printout.
.PP
The 
.B -d
option causes
.IR diff (1)
.B -c
to be run for each adjacent pair of dump files, while
.B -b
runs
.IR diff
.BR -cb .
.PP
The
.B -u
option causes times to be printed in GMT (UT) rather than local time.
.PP
Finally, the
.B -s
option
sets the starting (most recent) date for the output.
.SH EXAMPLES
.PP
Examine changes in block.c:
.IP
.EX
hist -d block.c
.EE
.SH FILES
.TF /dump
.TP
.B /dump
by convention, root of dump file system
.PD
.SH SOURCE
.B \*9/src/cmd/hist.c
.SH SEE ALSO
.IR yesterday (1),
.IR vbackup (8)
.SH BUGS
Should be called
.IR history ,
but
that name is taken by
.IR sh (1).