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2010
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January
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Useful exim commands
01/22/10
Here are some helpful hints on exim administration. All of the commands are formated for debian (exim4) but are also tested on centos (exim).
List message count in message queue:
# exim4 -bpc
List all messages in the queue, sorted by date:
# exim4 -bp
Print
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Useful exim commands
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January
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2007
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March
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List user open sockets on cPanel server
03/17/07
As simple as this:
lsof -n -u^65534,^`cat /etc/passwd | awk -F':' '{if($3 < 32000) print $3}' | xargs | sed -e 's/ /,\^/g'` -i | awk '{if ($2 ~ /[0-9]*/) print $3, $1}' | sort | uniq -c | sort -n
The awk part is for excludi
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List user open sockets on cPanel server
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February
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How to extract SYN packets with tcpdump
02/21/07
tcpdump
# tcpdump -ne dst port 80 and 'tcp[13] & 2 == 2'
This way effectively filtering only SYN packets on port 80.
# tcpdump -c 30000 -ne dst port 80 and 'tcp[13] & 2 == 2' | awk '{print $11}' | cut -d. -f1|sort | uniq -c -
WPA for Ubuntu
02/18/07
It is a bit tricky (took me almost two days :), but basically this is the procedure:
- configure your wireless card
(using ndiswrapper is described in another article)
in case your wifi card is identified as wlan0 add the following to /etc/network/interfaces
auto wlan -
Make BASH update your terminal window title after logon
02/18/07
~/.bash_profile
This code would do the trick:
if [ "$TERM" = "xterm" ] ; then
export PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME}\007"'
else
unset PROMPT_COMMAND
fi
After logon th -
FreeBSD rc.firewall fix for blacklisted ip support
02/18/07
/etc/rc.firewall
Add this code at the end of the set_loopback function:
if [ -f "${banned_ips}" ]; then
for i in `cat ${banned_ips} | grep -vE "^#"`; do
echo ${fwcmd} add deny ip from ${i} to me
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How to extract SYN packets with tcpdump
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March