Showing posts from February, 2012

How to access NTFS partition in Rhel/Centos 5/6

$ cd Download
$ wget
# rpm -ivh epel-release-6-5.noarch.rpm

You must be logged in as Root for the below command to work :

# yum install ntfs-3g
Checking the Name of an NTFS Partition

Entering the below commands would help you determine the name of an NTFS partition :
# fdisk -l /dev/sda
# fdisk -l /dev/sdb
Steps to Mount /dev/sda1 NTFS Partition at /mnt/ntfs

It is essential to load the fuse driver. The below command should help you do that :
# modprobe fuse

Now using the below command you must build a mount point:
# mkdir /mnt/ntfs

The following command would help you with mounting the ntfs partition :
# mount -t ntfs-3g /dev/sda1 /mnt/ntfs

Command for Unmounting the NTFS Partition

# umount /mnt/ntfs

How to configure ACL in Linux

ACLs can be configured:

 1.Per user
2. Per group
3.Via the effective rights mask
4.For users not in the user group for the file

Enable ACL support on the partition.
Edit /etc/fstab file and change the default parameter to rw,acl
If we want to enable acl for /mnt

Now, you will need to remount the /mnt partition with the "acl" option. The easiest way to do this is with the "remount" option, since it will work even while the partition is in use:

[root@vishal /]# mount -v -o remount /mnt/
/dev/sda5 on /mnt type ext3 (rw,acl)

Create a user and group:-
 [root@vishal /]# useradd vishal
[root@vishal /]# groupadd linux
[root@vishal /]# usermod -a -G linux vishal

Now, we can actually start using ACLs. The basic commands that we are interested in are:

[root@vishal /]#  setfacl -m u:vishal:rw- /mnt/
[root@vishal /]#  getfacl /mnt/
getfacl: Removing leading '/' from absolute path names
# file: mnt
# owner: root
# group: root

Configure SSL Apache on Ubuntu...

Generate a Self-Signed Certificate:-

$a2enmod ssl
$mkdir /etc/apache2/ssl
$openssl req -new -x509 -days 365 -nodes -out /etc/apache2/ssl/ssl.pem -keyout /etc/apache2/ssl/ssl.key

You will be asked for several configuration values. Enter values appropriate for your organization and server, as shown here.

Generating a 1024 bit RSA private key
writing new private key to '/etc/apache2/ssl/ssl.key'
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
Country Name (2 letter code) [AU]:IN
State or Province Name (full name) [Some-State]:Gujarat
Locality Name (eg, city) []:Ahmedabad
Organization Name (eg, company) [Internet Widgits Pty Ltd]:VishalVyas Ltd

Apache Tomcat in ubuntu

Ddownload Tomcat

Unzip it with tar -zxvf  Tomcatxxx.tar
tar -zxvf apache-tomcat-7.0.25.tar.gz

No make or configuration required, just change to tomcat bin folder to start or stop Tomcat

For Staring Tomcat:
sudo /opt/tomcat7/bin/

To Shutdown Tomcat:
sudo /opt/tomcat7/bin/

Done .... !!!!!