history /adm/users

produces

May 14 15:29:18 EDT 2001 /adm/users 10083 [adm] May 14 15:29:18 EDT 2001 /n/dump/2001/0515/adm/users 10083 [adm] May 11 17:26:24 EDT 2001 /n/dump/2001/0514/adm/users 10481 [adm] May 10 16:40:51 EDT 2001 /n/dump/2001/0511/adm/users 10476 [adm] ...

When presented with a path of the form /n/fs/path, history will use fsdump as the name of the dump file system, and will print a history of path.

The -v option enables verbose debugging printout.

The -D option causes diff(1) to be run for each adjacent pair of dump files. The options -abcemnw are passed through to diff; the little-used diff option -f is replaced by the functionality described below, and the -r option is disallowed.

The -u option causes times to be printed in GMT (UT) rather than local time.

The -d option selects some other dump file system such as /n/bootesdump.

The -f option forces the search to continue even when the file in question does not exist (useful for files that only exist intermittently).

Finally, the -s option sets the starting (most recent) date for the output.

history /usr/ches/tmp