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Install truecrypt on Linux CentOS

June 5, 2015 by admin · Leave a comment

This is small guide on how to install truecrypt on Linux CentOS.

Truecrypt is probably the greatest encryption software that I’ve used to protect my files, unfortunately it has been discontinued by it’s developers for some very strange reasons.

However, that doesn’t mean that you cannot install it on your Linux machine.
So here goes the install process for truecrypt 7.1a, the console version of this crypto tool:

1. Download the tar.gz archive from here or use wget from the command line, see below.

- wget http://nixware.net/wp-content/uploads/2015/06/truecrypt-7.1a-linux-console-x86.tar.gz

2. Extract the truecrypt archive:

tar -xvf ./ truecrypt-7.1a-linux-console-x86.tar.gz

cd ./truecrypt-7.1a-linux-console-x86

3. Give execution permissions to the installer script.

chmod 755 ./truecrypt-7.1a-linux-console-x86

4. Install the requirements: libstdc++.so.6 and libfuse.so.2

yum install libfuse.so.2 libstdc++.so.6

5. Run the truecrypt installer:

[root@lnx truecrypt]# ./truecrypt-7.1a-setup-console-x86

– select option 1

6. Create a new volume with:

/usr/bin/truecrypt -c

– follow the easy steps in the volume setup

7. Mount the container to a specified directory:

[root@nix truecrypt]# truecrypt -t -k "" --protect-hidden=no container1 /media/truecrypt1
Enter password for /home/user1/truecrypt/container1:
[root@nix truecrypt]# cd /media/truecrypt1
[root@nix truecrypt1]# ls
[root@nix truecrypt1]# pwd
/media/truecrypt1

8. Dismount a container:

truecrypt -d

9. (Optional) Check https://www.grc.com/misc/truecrypt/truecrypt.htm for some nice info

That’s it. Have fun hiding your stuff!

Posted in How to. Tagged with centos, console, linux, truecrypt.

How to save iptables

August 26, 2014 by admin · Leave a comment

In this article you will find out how to save iptables firewall rules in Linux CentOS, Redhat, Debian and Ubuntu.

Iptables is a Linux application built for the purpose of allowing a system administrator to configure and maintain specific firewall tables/rules provided by the Linux kernel firewall module.
There are currently 3 different kernel modules build for the IPv4, IPv6 and ARP stack protocols (iptables is used for IPv4, ip6tables refferes to IPv6, arptables to Addres Resolution Protocol).

The most used and the one used in this tutorial is iptables. In order to execute iptables related commands you need root privileges or to be in the sudoers file in Debian/Ubuntu OSes.

So here’s how to save iptables and how to list existing ones:

The syntax used to check the iptables service status is:

service iptables status  ##CentOS, Redhat
sudo iptables -L -n -v   ##Debian, Ubuntu

To start iptables:

service iptables start ##CentOS, Redhat
sudo ufw enable ##Ubuntu

To list iptables rules:

iptables -L

Save iptables rules:

iptables-save  #Debian
sudo iptables-save  #Ubuntu
service iptables save #CentOS

On CentOS, for example, you would see an output like this:

To restore iptables rules:

~ # iptables-restore &lt; /etc/sysconfig/iptables
root@nyxware
~ #

Posted in BASH, How to, linux, Networking, tutorial. Tagged with centos, debian, firewall, iptables, linux, redhat, rules, save iptables rules, ubuntu.