OSCP Review – Proctored Version
About Me: I am motivated IT professional with 14 years of experience in the IT industry. During the initial days of my career I worked as a programmer. After some time I got interested...
Linux and Security Blog
Setting up PostGresql Replication with Loadbalancing with PGPOOL II
Installation (on both Master and Slave Nodes): yum install https://yum.postgresql.org/9.5/redhat/rhel-7-x86_64/pgdg-centos95-9.5-3.noarch.rpm yum install postgresql95 postgresql95-server postgresql-libs postgresql95-contrib rsync Initialize the database and configure postgresql /usr/pgsql-9.5/bin/postgresql95-setup initdb cd /var/lib/pgsql/9.5/data cp postgresql.conf postgresql.conf.orig chown postgres postgresql.conf.orig...
Rotate your video with ffmpeg
You might run into an issue with the orientation on your videos at times and yeah it is super easy to rotate your video with a free and open source utility ffmpeg. Here is...
Cut Video file with ffmpeg
FFMPEG is an open source and really powerful audio/video processor. You can do a lot of different things with ffmpeg. One of which is to cut video. Below are some examples to see how...
Configure postfix to use Sendgrid as default Relay
If you would like to configure postfix to use Sendgrid as the mail relay, you can do so by editing the postfix main configuration file. vi /etc/postfix/main.cf And then paste the content below at...
WordPress Admin Security
Yeah there are a lot of script kiddies out there scanning word press sites and brute forcing word press admin logins. There are ways you can limit access to the wordpress admin panel from...
Touch command tips and tricks
Changing modification time using touch: touch -d ‘-4 day’ filename touch -d ‘-4 hour’ filename touch -d "30 days ago" filename Setting Timestamp : touch -t 201606101712 filename
Bash – Convert a comma separated list to any Array
#!/bin/bash IFS="," sampleData="59,100,23,98,50" arr=($sampleData) for i in "${!arr[@]}";do echo Item $i:"${arr[$i]}" done unset IFS echo "Completed"
Random Wake up of Windows Machine from Sleep mode
It happens at times that the windows machine wakes up randomly from sleep mode. Here are some steps you may be able to follow to identify the cause and address the issue : Find...
Installing newer or multiple version of python on Centos
I stumbled across this situation where I needed to install python > 2.7 on Centos. Yum breaks if you upgrade the system python as yum relies on python 2.6 . So the only way...
Postfix Queue Management
Retry delivery of mail in queue : postqueue -f Flush mail for a domain to primary mail server from Relay server: postqueue -s domain.com Delete all email in queue for a domain: postqueue -p...