Nov 5, 2014

CentOS 7 and RHEL 7 new commands

In CentOS 7/RHEL 7 the 'service' command has now been changed to systemctl. Now the command are:
systemctl start sshd.service 
The above line will start sshd service.

systemctl restart sshd
The above line is a short form command.

chkconfig command has also changed.

Now to enable service during boot is:
systemctl enable sshd
To disable service during boot is:
systemctl disable sshd

To check startup list:
systemctl list-unit-files --type=service

Jul 25, 2014

Install Wordpress on CentOS/RHEL

Download the latest version of Wordpress extract the zipped filw.

1. wget
2. tar xzf latest.tar.gz

Now assigning to group and setting folder permission.

1. chown -R apache.apache wordpress
2. chmod -R 755 wordpress

Configuring Apache

1. cd /etc/httpd/conf.d/
2. Create a file wordpress.conf
3. wordpress.conf

Alias /wordpress /home/wordpress
<Directory /home/wordpress>
Order allow,deny
Allow from all

4. service httpd restart

Browse at localhost/wordpress it should show you wordpress site.

That's it. You can use the existing mysql connection and connect to wordpress site.

Jul 3, 2014

Druknet PPoE VPI/VCI

If you are using Druknet broadband, following are the VPI and VCI value you need to know when you configure in your Wireless Access Point.

VPI (Virtual Path Identifier) = 0
VCI (Virtual Channel Identifier) = 35

Jun 22, 2014

Update Kali Linux from ISO image with no network

Mount the ISO to /mnt directory
sudo mount -t iso9660 -o loop /path/to/iso /mnt/

Modify the /etc/apt/sources.list
deb file:///mnt kali main contrib non-free

Comment out all other repository locations from the file except the about one.

Update the system
sudo apt-get update
sudo apt-get dist-upgrade

We have now updated the system from the ISO, now we need to un-comment back the official repository locations and comment our newly added ISO repository.

Un-mount the ISO
sudo umount /mnt

Apr 30, 2014

How to connect to remote desktop using linux

Remmina has now been moved to FreeRDP. To connect to remote desktop using freerdp command

sudo  xfreerdp /size:800x600 /u:administrator /v:

with the above command I am connecting to windows server where remote desktop is enabled with the screen resolution 800x600. By default remote desktop works on tcp port 3389.

Jan 21, 2014

Clear Zimbra Mail Queue

If you want to clear mail queue from specific email address run the following command in your terminal.

Below will remove mail queues, by checking FROM sender. eg. remove all mail queues sent by

/opt/zimbra/postfix/sbin/mailq | tail -n +2 | grep -v '^ *(' | awk 'BEGIN { RS = "" } { if ($7 == "info@example.comt") print $1 } ' | tr -d '*!' | xargs -rn1 /opt/zimbra/postfix/sbin/postsuper -d

Below will remove mail queues, by checking TO sender. eg. remove all mail queues sent to

/opt/zimbra/postfix/sbin/mailq | tail -n +2 | grep -v '^ *(' | awk 'BEGIN { RS = "" } { if ($8 == "info@example.comt") print $1 } ' | tr -d '*!' | xargs -rn1 /opt/zimbra/postfix/sbin/postsuper -d

Nov 24, 2013

Things to do after install Kali Linux

Kali Linux basically come with pen testing packages, but you still need some day to day utilities packages. Here are the list of things that I do after installing Kali Linux.

1. Installing Archiving package
sudo apt-get install unrar unace rar unrar p7zip zip unzip p7zip-full p7zip-rar file-roller

2. Installing Gimp
sudo apt-get install gimp

3. Installing Virtual Box
sudo apt-get install virtualbox

4. Installing Remote Desktop Client
sudo apt-get install remmina

5. Installing FTP Client
sudo apt-get install filezilla filezilla-common

6. Installing Adobe Flash Player
sudo apt-get install flashplugin-nonfree

7. Installing PlayonLinux
sudo apt-get install playonlinux

Finally adding repository . So that you can install additional multimedia packages on you Debian box.

8. Installing video editing package
sudo apt-get install avidemux

Oct 16, 2013

Disable Ubuntu Guest Session

Follow the following steps in the terminal

sudo -i
gedit /etc/lightdm/lightdm.conf

If you don't find above line then:
sudo gedit /usr/share/lightdm/lightdm.conf.d/50-ubuntu.conf 

Add the following line and save

Then reboot the machine

Oct 4, 2013

Remove Log files from Checkpoint

Here is how you can delete checkpoint old log files

1. Go to Gaia Terminal
2. Enter expert mode
3. echo $FWDIR to get the log file location
4. Go to the Log directory cd $FWDIR/log
5. rm 2013-10-01* to remove 1st Oct 2013 logs

Jul 20, 2013

Install Latest LibreOffice in Linux

Download the latest version on LibreOffice from its website.

1. Uncompress the file
tar zvxf LibreOfficeXXXX.tar.gz

2. Go to respective folder
cd DEBS or cd RPMS

3. Installation
dpkg -i *.deb or yum localinstall *.rpm

4. Desktop Integration
cd desktop-integration

5. Install Desktop Integration
dpkg -i *.deb or yum localinstall *.rpm

*This procedure will work on RedHat & Debian Linux