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LASTCOMM (1) | General commands | Unix Manual Pages | :man


lastcomm - show last commands executed in reverse order


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


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

The following options are available:

-E Print the time the process exited.
-S Print the time the process started.
-c Print the amount of cpu time used by the process.
-e Print the amount of elapsed time used by the process.
-s Print the amount of system time used by the process.
-u Print the amount of user time used by the process.
-f file
Read from file rather than the default /var/account/acct.

If no options are specified, -cS is assumed. If lastcomm is invoked with arguments, only accounting entries with a matching command name, user name, or terminal name are printed. 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 (-c), wall (-e), system (-s), or user (-u) time used by the process (in seconds).
  • The time the process started (-S) or exited (-E).

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), ‘‘D’’ indicates the command terminated with the generation of a core file, and ‘‘X’’ indicates the command was terminated with a signal.


default accounting file


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


Created by Blin Media, 2008-2013