I'm making a little progress in identifying the unknown syscalls. It often helps if you are not so cold and remember to look for a log... The failed call below is root doing a grep. I do not know why it failed. The PPID is a bash shell. Any good docs available to explain the codes? Thanks! Leam ### grep SYSCALL audit.log | grep "success=no" | tail -1 type=SYSCALL msg=audit(1382703881.711:2677787): arch=c000003e syscall=2 success=no exit=-2 a0=7914b20 a1=0 a2=0 a3=3a89724793 items=1 ppid=25339 pid=26563 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts1 ses=4445 comm="grep" exe="/bin/grep" subj=root:system_r:unconfined_t:s0-s0:c0.c1023 key=(null) -- Mind on a Mission <http://leamhall.blogspot.com/>