Perhaps it's selinux? -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx [mailto:redhat-list-bounces@xxxxxxxxxx] On Behalf Of Vimal Sent: Saturday, 21 August 2010 6:42 a.m. To: redhat-list@xxxxxxxxxx Subject: Strace and lsof do not work Hi, Why am I unable to strace / lsof into certain processes, even as "root" user? I am unable to find a concrete answer for this. Please assist. ======== root 14940 0.0 0.1 10380 2552 ? SN 13:02 0:00 \_ /usr/sbin/exim -q root@dedicated100 [~]# lsof -p 14940 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME exim 14940 root cwd unknown /proc/14940/cwd (readlink: Permission denied) exim 14940 root rtd unknown /proc/14940/root (readlink: Permission denied) exim 14940 root txt unknown /proc/14940/exe (readlink: Permission denied) exim 14940 root 0 unknown /proc/14940/fd/0 (readlink: Permission denied) exim 14940 root 1 unknown /proc/14940/fd/1 (readlink: Permission denied) exim 14940 root 2 unknown /proc/14940/fd/2 (readlink: Permission denied) exim 14940 root 3 unknown /proc/14940/fd/3 (readlink: Permission denied) exim 14940 root 4 unknown /proc/14940/fd/4 (readlink: Permission denied) root@dedicated100 [~]# strace -p 14940 attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted ======== -- Regards, Vimal Kumar K | vimalZworld.com * technomenace.com * twitter.com/vimal7370 | | E: vimal7370 at gmail dot com P: +919947450760 | -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list ========================================================== For more information on the Television New Zealand Group, visit us online at tvnz.co.nz ========================================================== CAUTION: This e-mail and any attachment(s) contain information that is intended to be read only by the named recipient(s). This information is not to be used or stored by any other person and/or organisation. -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
