AUSEARCH:(8) System Administration Utilities AUSEARCH:(8)
NAME ausearch - a tool to query audit daemon logs
SYNOPSIS ausearch [options]
DESCRIPTION ausearch is a tool that can query the audit daemon logs based for events based on different search criteria. The ausearch utility can also take input from stdin as long as the input is the raw log data. Each commandline option given forms an "and" statement. For example, searching with -m and -ui means return events that have both the requested type and match the user id given. An exception is the -n option; multiple nodes are allowed in a search which will return any matching node.
It should also be noted that each syscall excursion from user space into the kernel and back into user space has one event ID that is unique. Any auditable event that is triggered during this trip share this ID so that they may be correlated.
Different parts of the kernel may add supplemental records. For exam- ple, an audit event on the syscall "open" will also cause the kernel to emit a PATH record with the file name. The ausearch utility will present all records that make up one event together. This could mean that even though you search for a specific kind of record, the result- ing events may contain SYSCALL records.
Also be aware that not all record types have the requested information. For example, a PATH record does not have a hostname or a loginuid.
OPTIONS -a, --event audit-event-id Search for an event based on the given event ID. Messages always start with something like msg=audit(1116360555.329:2401771). The event ID is the number after the :. All audit events that are recorded from one applications syscall have the same audit event ID. A second syscall made by the same application will have a different event ID. This way they are unique.
--arch CPU Search for events based on a specific CPU architecture. If you do not know the arch of your machine but you want to use the 32 bit syscall table and your machine supports 32 bits, you can also use b32 for the arch. The same applies to the 64 bit syscall table, you can use b64. The arch of your machine can be found by doing uname -m.
-c, --comm comm-name Search for an event based on the given comm name. The comm name is the executables name from the task structure.
--debug Write malformed events that are skipped to stderr.
--checkpoint checkpoint-file Checkpoint the output between successive invocations of ausearch such that only events not previously output will print in subse- quent invocations.
An auditd event is made up of one or more records. When processing events, ausearch defines events as either complete or in-complete. A complete event is either a single record event or one whose event time occurred 2 seconds in the past compared to the event being currently processed.
A checkpoint is achieved by recording the last completed event output along with the device number and inode of the file the last completed event appeared in checkpoint-file. On a subse- quent invocation, ausearch will load this checkpoint data and as it processes the log files, it will discard all complete events until it matches the checkpointed one. At this point, it will start outputting complete events.
Should the file or the last checkpointed event not be found, one of a number of errors will result and ausearch will terminate. See EXIT STATUS for detail.
-e, --exit exit-code-or-errno Search for an event based on the given syscall exit code or errno.
-f, --file file-name Search for an event based on the given filename.
-ga, --gid-all all-group-id Search for an event with either effective group ID or group ID matching the given group ID.
-ge, --gid-effective effective-group-id Search for an event with the given effective group ID or group name.
-gi, --gid group-id Search for an event with the given group ID or group name.
-h, --help Help
-hn, --host host-name Search for an event with the given host name. The hostname can be either a hostname, fully qualified domain name, or numeric network address. No attempt is made to resolve numeric addresses to domain names or aliases.
-i, --interpret Interpret numeric entities into text. For example, uid is con- verted to account name. The conversion is done using the current resources of the machine where the search is being run. If you have renamed the accounts, or dont have the same accounts on your machine, you could get misleading results.
-if, --input file-name | directory Use the given file or directory instead of the logs. This is to aid analysis where the logs have been moved to another machine or only part of a log was saved.
--input-logs Use the log file location from auditd.conf as input for search- ing. This is needed if you are using ausearch from a cron job.
--just-one Stop after emitting the first event that matches the search cri- teria.
-k, --key key-string Search for an event based on the given key string.
-l, --line-buffered Flush output on every line. Most useful when stdout is connected to a pipe and the default block buffering strategy is undesir- able. May impose a performance penalty.
-m, --message message-type | comma-sep-message-type-list Search for an event matching the given message type. You may also enter a comma separated list of message types. There is an ALL message type that doesn t exist in the actual logs. It allows you to get all messages in the system. The list of valid messages types is long. The program will display the list when- ever no message type is passed with this parameter. The message type can be either text or numeric. If you enter a list, there can be only commas and no spaces separating the list.
-n, --node node-name Search for events originating from node name string. Multiple nodes are allowed, and if any nodes match, the event is matched.
-o, --object SE-Linux-context-string Search for event with tcontext (object) matching the string.
-p, --pid process-id Search for an event matching the given process ID.
-pp, --ppid parent-process-id Search for an event matching the given parent process ID.
-r, --raw Output is completely unformatted. This is useful for extracting records that can still be interpreted by audit tools.
-sc, --syscall syscall-name-or-value Search for an event matching the given syscall. You may either give the numeric syscall value or the syscall name. If you give the syscall name, it will use the syscall table for the machine that you are using.
-se, --context SE-Linux-context-string Search for event with either scontext/subject or tcontext/object matching the string.
--session Login-Session-ID Search for events matching the given Login Session ID. This pro- cess attribute is set when a user logs in and can tie any pro- cess to a particular user login.
-su, --subject SE-Linux-context-string Search for event with scontext (subject) matching the string.
-sv, --success success-value Search for an event matching the given success value. Legal val- ues are yes and no.
-te, --end [end-date] [end-time] Search for events with time stamps equal to or before the given end time. The format of end time depends on your locale. If the date is omitted, today is assumed. If the time is omitted, now is assumed. Use 24 hour clock time rather than AM or PM to spec- ify time. An example date using the en_US.utf8 locale is 09/03/2009. An example of time is 18:00:00. The date format accepted is influenced by the LC_TIME environmental variable.
You may also use the word: now, recent, today, yesterday, this-week, week-ago, this-month, this-year. Today means starting now. Recent is 10 minutes ago. Yesterday is 1 second after mid- night the previous day. This-week means starting 1 second after midnight on day 0 of the week determined by your locale (see localtime). This-month means 1 second after midnight on day 1 of the month. This-year means the 1 second after midnight on the first day of the first month.
-ts, --start [start-date] [start-time] Search for events with time stamps equal to or after the given end time. The format of end time depends on your locale. If the date is omitted, today is assumed. If the time is omitted, mid- night is assumed. Use 24 hour clock time rather than AM or PM to specify time. An example date using the en_US.utf8 locale is 09/03/2009. An example of time is 18:00:00. The date format accepted is influenced by the LC_TIME environmental variable.
You may also use the word: now, recent, today, yesterday, this-week, this-month, this-year. Today means starting at 1 sec- ond after midnight. Recent is 10 minutes ago. Yesterday is 1 second after midnight the previous day. This-week means starting 1 second after midnight on day 0 of the week determined by your locale (see localtime). This-month means 1 second after midnight on day 1 of the month. This-year means the 1 second after mid- night on the first day of the first month.
-tm, --terminal terminal Search for an event matching the given terminal value. Some dae- mons such as cron and atd use the daemon name for the terminal.
-ua, --uid-all all-user-id Search for an event with either user ID, effective user ID, or login user ID (auid) matching the given user ID.
-ue, --uid-effective effective-user-id Search for an event with the given effective user ID.
-ui, --uid user-id Search for an event with the given user ID.
-ul, --loginuid login-id Search for an event with the given login user ID. All entry point programs that are pamified need to be configured with pam_loginuid required for the session for searching on loginuid (auid) to be accurate.
-uu, --uuid guest-uuid Search for an event with the given guest UUID.
-v, --version Print the version and exit
-vm, --vm-name guest-name Search for an event with the given guest name.
-w, --word String based matches must match the whole word. This category of matches include: filename, hostname, terminal, and SE Linux con- text.
-x, --executable executable Search for an event matching the given executable name.
EXIT STATUS 0 if OK,
1 if nothing found, or argument errors or minor file acces/read errors,
10 invalid checkpoint data found in checkpoint file,
11 checkpoint processing error
12 checkpoint event not found in matching log file
SEE ALSO auditd(8), pam_loginuid(8).
Red Hat Sept 2009 AUSEARCH:(8)