02-09-2010
Quote:
Originally Posted by
frans
Then use a subshell where you can kill the tcpdump, but don't put your tcpdump in a subshell : a subshell can't return any value to its parent process.
Thanks, but I have no idea how this might look like. Can you give me a short explanation/example?
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi Perl/UNIX experts,
I have a problem in running a shell script from my perl script (auto.pl).
I run the perl script using
perl auto.pl
from the shell prompt
The shell script picks the files in "input" folder and procesess it.
The shell script blue.sh has this code.
export... (16 Replies)
Discussion started by: hifake
16 Replies
2. Shell Programming and Scripting
hi all,
for an example:
$ ps -ef | grep apache | awk '{ print $2, $3 }'
24073 11784
28021 1
28022 1
28038 1
28041 28040
28045 28041
28047 28041
28040 1
28049 28041
28051 28041
28053 28041
28030 1
28054 28041
28055 28041
28056 28041
28057 28041 (5 Replies)
Discussion started by: raghur77
5 Replies
3. Shell Programming and Scripting
Hi Experts, we do have a shell script for Unix Solaris, which will kill all the process manullay, it used to work in my previous env, but now it is throwing this error.. could some one please help me to resolve it
This is how we execute the script (and this is the requirement) ... (2 Replies)
Discussion started by: jonnyvic
2 Replies
4. Shell Programming and Scripting
Hi,
I've a script which kills all process, but i need a script shell script(sh), where it'll kill process on that particular terminal. below is example
TY=`tty`
for P in $TY
do
`kill -9 $P 2>/dev/null`;
done
echo "test process killed"
break
... (3 Replies)
Discussion started by: asak
3 Replies
5. Shell Programming and Scripting
Hi everyone
i am very new to linux , working on bash shell.
I am trying to solve the given problem
1. Create a process and then create children using fork
2. Check the Status of the application for successful running.
3. Kill all the process(threads) except parent and first child... (2 Replies)
Discussion started by: vizz_k
2 Replies
6. UNIX for Dummies Questions & Answers
Hi!
I need your help, please.
I'm in AIX node and sometimes listener process from an oracle instance gets duplicated, i mean that it get spawned a second listener process. As we can't apply changes to the databases on this months, i want to build a shell that can identify the second... (6 Replies)
Discussion started by: Pactows
6 Replies
7. Shell Programming and Scripting
Hello,
I'd like to set a cron job that runs a shell script every 30 minutes or so to restart a java based service if the memory gets above 80%. Any advice on how to do this?
Thanks in advance!
- Ryan (19 Replies)
Discussion started by: prometheon123
19 Replies
8. Shell Programming and Scripting
hi,
Am a newbie to unix and wasnt able to write script to my requirement.
I need a shell script, which should find a process by name and kill it. For eg: let the process name be "abc". I have different processes running by this name(abc), so should kill them all.
Condition would be: if... (7 Replies)
Discussion started by: fop4658
7 Replies
9. Shell Programming and Scripting
HI i would like to know how i can simulate a shell scripts for my requirement.
example
Server name child Process id Parent Process id
Vpesh 16013 15637
Server name child Process id Parent Process id
Vpesh 16014 15637
Server name child... (1 Reply)
Discussion started by: vpesh
1 Replies
10. Shell Programming and Scripting
Hi All, Looking for a quick LINUX shell script which can continuously monitors the flle size, report the process which is creating a file greater than certain limit and also kill that process. Can someone please help me on this? (4 Replies)
Discussion started by: vasavimacherla
4 Replies
ENC(4) BSD Kernel Interfaces Manual ENC(4)
NAME
enc -- Encapsulating Interface
SYNOPSIS
To compile this driver into the kernel, place the following line in your kernel configuration file:
device enc
DESCRIPTION
The enc interface is a software loopback mechanism that allows hosts or firewalls to filter ipsec(4) traffic using any firewall package that
hooks in via the pfil(9) framework.
The enc interface allows an administrator to see incoming and outgoing packets before and after they will be or have been processed by
ipsec(4) via tcpdump(1).
The ``enc0'' interface inherits all IPsec traffic. Thus all IPsec traffic can be filtered based on ``enc0'', and all IPsec traffic could be
seen by invoking tcpdump(1) on the ``enc0'' interface.
What can be seen with tcpdump(1) and what will be passed on to the firewalls via the pfil(9) framework can be independently controlled using
the following sysctl(8) variables:
Name Defaults Suggested
net.enc.out.ipsec_bpf_mask 0x00000003 0x00000001
net.enc.out.ipsec_filter_mask 0x00000001 0x00000001
net.enc.in.ipsec_bpf_mask 0x00000001 0x00000002
net.enc.in.ipsec_filter_mask 0x00000001 0x00000002
For the incoming path a value of 0x1 means ``before stripping off the outer header'' and 0x2 means ``after stripping off the outer header''.
For the outgoing path 0x1 means ``with only the inner header'' and 0x2 means ``with outer and inner headers''.
incoming path |------|
---- IPsec processing ---- (before) ---- (after) ----> | |
| Host |
<--- IPsec processing ---- (after) ----- (before) ---- | |
outgoing path |------|
Most people will want to run with the suggested defaults for ipsec_filter_mask and rely on the security policy database for the outer head-
ers.
EXAMPLES
To see the packets the processed via ipsec(4), adjust the sysctl(8) variables according to your need and run:
tcpdump -i enc0
SEE ALSO
tcpdump(1), bpf(4), ipf(4), ipfw(4), ipsec(4), pf(4), tcpdump(8)
BSD
November 28, 2007 BSD