Linux Shtuff

Here is a snippet of code which will allow you to find all non-Red Hat-supplied packages: rpm -qa –qf ‘%{NAME}-%{VERSION}-%{RELEASE}.%{ARCH} %{VENDOR}\n’ | grep -v ‘Red Hat, Inc\.’ | sort

Here are a few more one liners that I use quite often to locate large number of apache connections, large numbers of site connections, the busiest site on the server and busiest script on the server. large number of apache connections netstat -plan | grep :80 | awk ‘{print $5}’ | sed ‘s/:.*$//’ | sort…

Here is a small one liner which will pull a list of IP addresses from a file, sort them, select only unique ip’s and then list them from greatest to least. perl -ne ‘while (/([0-9]+\.){3}[0-9]+/g) {print “$&\n”};’ /var/log/exim_mainlog |uniq -c |sort -nr |head -100 You can also modify this to include an output file by…

Auto block IP’s with high connection counts via iptables; via lovepig.org netstat -npa –inet | grep :80 | sed ‘s/:/ /g’ | awk ‘{print $6}’ | sort | uniq -c | sort -n | while read line; do one=`echo $line | awk ‘{print $1}’`; two=`echo $line | awk ‘{print $2}’`; if [ $one -gt 100…

Today we will be looking at implementing new software on a production server. So, lets get right to the heart of the matter. The 5 basic processes you will need to follow in getting the new software operating properly and as expected in an existing production environment will include; Strategic Planning/Design – Identifying Needs/Goals Modeling…

This will come in handy in case you ever come across this issue. I am seeing a strange occurrence in whm ‘Main >> System Health >> Show Current CPU Usage’ and in the base OS via the command line. (I know whm pulls cpu info from the OS via script) When I run a ‘ps…

Quick one liner for you this new year… Generate a random 8 character or greater password containing a-z, A-Z and 0-9: egrep -ioam1 ‘[a-z0-9]{8}’ /dev/urandom to create longer passwords, replace the numeric value inside of the { } to whatever you would like. egrep -ioam1 ‘[a-z0-9]{9}’ /dev/urandom UTohcE?Xb egrep -ioam1 ‘[a-z0-9]{10}’ /dev/urandom 1222oh2xEX egrep -ioam1…

Shamlessly grep’d from the http://www.hackerfactor.com/blog/ There be good stuff here… I’ve started attending a social group of bloggers. It’s part of my mandated community outreach ordered by she-who-must-be-obeyed. (“You need to get out of the office more than once a week!”) The group is primarily a bunch of people who are looking to use their…

Shamlessly grep’d from the http://www.hackerfactor.com/blog/ There be good stuff here… I’m not an electrician. While I am pretty confident that I can change a light bulb or plug something into an outlet, adding a new electrical outlet or installing a new light into the ceiling of my office is beyond my skill set. Much of…

Shamlessly grep’d from the http://www.hackerfactor.com/blog/ There be good stuff here… Security is a measurement of risk. Nothing is ever secure, but things can be made secure enough. Most of the time, online network attacks are not personal. The attacker does not want “your site” as much as they want “a” site and yours just happened…