fduran

# www.fduran.com
# what is this process? - mini forensics on unknown running process

ls -l /proc/$pid/exe
dpkg -S /path/to/process_binary
strings /path/to/process_binary
hexdump -C /path/to/process_binary
netstat -tapn|grep tang
lsof $pid

fduran

# www.fduran.com
# exclude a process from being killed by oom killer
echo -17 > /proc/$PID/oom_adj

# The possible values of oom_adj range from -17 to +15. The higher the score, more likely the associated process is to be killed by OOM-killer: https://lwn.net/Articles/317814/

fduran

#!/bin/bash
# generate a number of files with random sizes in a range
 
min=1      # min size (MB)
max=10     # max size (MB)
nofiles=20 # number of files
 
for i in `eval echo {1..$nofiles}`
do
    dd bs=1M count=$(($RANDOM%max + $min)) if=/dev/urandom of=./files/file$i

fduran

# see http://mysqltuner.com/
wget https://raw.githubusercontent.com/major/MySQLTuner-perl/master/mysqltuner.pl
perl mysqltuner.pl

fduran

# WP "Error establishing database connection"
# substitute with site's index static page (when it's up, not with the error duh)

wget http://example.com -O [/path/to/wp]/wp-content/db-error.php

fduran

# calculate mysql schemas disk size
mysql -h dbhost.example.com  -u theuser  -pThePassword -e 'select table_schema as DB, round(sum((data_length+index_length)/1024/1024),1) as MB from information_schema.tables group by table_schema order by MB desc'

fduran

#!/bin/bash
# check if mysql slave is running

log=/var/log/mysqlslave.log
[email protected]

date >> $log
res=`mysql -u root -pPassword -h db.example.com -N -B -e "show status like 'Slave_running'"|cut -f2`

if [ $res = 'ON' ]

fduran

# tail log file in browser
# go to server.example.com:777

pip install tailon 
tailon -f /var/log/example.log -b 0:0:0:0:777 &

fduran

# Checking for Shellshock attempts in web server logs

egrep "};|}\s*;" /var/log/apache2/access.log

fduran

Django Install - Apache

Once per server:

apt-get update && apt-get upgrade
apt-get install libapache2-mod-wsgi
apt-get install python-setuptools python-dev build-essential
easy_install -U pip