December 22, 2006 LASTCOMM 1

### NAME

lastcomm - show last commands executed in reverse order

### SYNOPSIS

lastcomm [-f file] [command ...] [user ...] [terminal ...]

### DESCRIPTION

lastcomm gives information on previously executed commands. With no arguments, lastcomm prints information about all the commands recorded during the current accounting file's lifetime.

Option:

-f file
  Read from file rather than the default accounting file.

If called with arguments, only accounting entries with a matching command name, user name, or terminal name are printed. So, for example:

```lastcomm` `a.out` `root` `ttyd0`

would produce a listing of all the executions of commands named ```a.out` by user root on the terminal ttyd0.

For each process entry, the following are printed.

- The name of the user who ran the process.
- Flags, as accumulated by the accounting facilities in the system.
- The command name under which the process was called.
- The amount of cpu time used by the process (in seconds).
- The time the process started.
- The elapsed time of the process.

The flags are encoded as follows: ``S'' indicates the command was executed by the super-user, ``F'' indicates the command ran after a fork, but without a following exec(3), ``C'' indicates the command was run in PDP-11 compatibility mode (VAX only), ``D'' indicates the command terminated with the generation of a ```core` file, and ``X'' indicates the command was terminated with a signal.

The ``S'' and ``C'' flags are no longer recorded by the system, but will be reported by lastcomm when reading from an accounting file generated by an older version of the system.

### FILES

```/var/account/acct`
  Default accounting file.

### SEE ALSO

last(1), sigaction(2), acct(5), core(5)

### HISTORY

The lastcomm command appeared in 3.0BSD.