rwbytype.d(1m) USER COMMANDS rwbytype.d(1m)NAME
rwbytype.d - read/write bytes by vnode type. Uses DTrace.
SYNOPSIS
rwbytype.d
DESCRIPTION
This program identifies the vnode type of read/write activity - whether that is for regular files, sockets, character special devices, etc.
This is measuring at the application level, so file activity may well be cached by the system.
Since this uses DTrace, only users with root privileges can run this command.
EXAMPLES
This samples until Ctrl-C is hit.
# rwbytype.d
FIELDS
PID process ID
CMD process name
VNODE vnode type (describes I/O type)
DIR direction, Read or Write
BYTES total bytes
DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver-
bose descriptions explaining the output.
EXIT
rwbytype.d will sample until Ctrl-C is hit.
AUTHOR
Brendan Gregg [Sydney, Australia]
SEE ALSO rwbypid.d(1M), rwbbypid.d(1M), dtrace(1M)version 0.70 Jan 11, 2006 rwbytype.d(1m)
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syscallbysysc.d(1m) USER COMMANDS syscallbysysc.d(1m)NAME
syscallbysysc.d - syscalls by syscall. Uses DTrace.
SYNOPSIS
syscallbysysc.d
DESCRIPTION
syscallbysysc.d is a DTrace OneLiner to a report of the number of each type of system call made.
This is useful to identify which system call is the most common.
Docs/oneliners.txt and Docs/Examples/oneliners_examples.txt in the DTraceToolkit contain this as a oneliner that can be cut-n-paste to run.
Since this uses DTrace, only users with root privileges can run this command.
EXAMPLES
This samples until Ctrl-C is hit.
# syscallbysysc.d
FIELDS
first field
This is the system call type. Most have man pages in section 2.
second field
This is the count, the number of occurrances for this system call.
DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver-
bose descriptions explaining the output.
EXIT
syscallbysysc.d will sample until Ctrl-C is hit.
AUTHOR
Brendan Gregg [Sydney, Australia]
SEE ALSO procsystime(1M), dtrace(1M), truss(1)version 1.00 May 15, 2005 syscallbysysc.d(1m)
What is the command to check the activity of all users with root access on a Unix platform? Right now, there is like about 20 users with root and someone accidentally made some changes to the crontab and I need to trace which user did it. (5 Replies)