Free partition magic software for linux

Partition Image application is a Linux/UNIX utility which saves partitions in many formats (see below) to an image file.
The image file can be compressed in the GZIP/BZIP2 formats to save disk space, and split into multiple files to be copied on removable floppies (ZIP for example); partitions can be saved across the network since version 0.6.0.
Partition Image will only copy data from the used portions of the partition. For speed and efficiency, free blocks are not written to the image file.
This is unlike the dd command, which also copies empty blocks. Partition Image also works for large, very full partitions. For example, a full 1 GB partition can be compressed with gzip down to 400MB.
This is very useful to save partitions to an image in some cases:
- First you can restore your linux partition if there is a problem (virus, file system errors, manipulation error) . When you have a problem, you just have to restore the partition, and after 10 minutes, you have the original partition. You can write the image to a CD-R if you dont want the image to use hard-disk space.
- This utility can be used to install many identical PCs. For example, if you buy 50 PCs, with the same hardware, and you want to install the same linux systems on all 50 PCs, you will save a lot of time. Indeed, you just have to install on the first PC and create an image from it. For the 49 others, you can use the image file and Partition Images restore function.

Set::Partition is a Perl module that can enumerate all arrangements of a set in fixed subsets.

SYNOPSIS

use Set::Partition;

my $s = Set::Partition->new(
list => [qw(a b c d e)],
partition => [2, 3],
);
while (my $p = $s->next) {
print join( , map { "(@$_)" } @$p ), $/;
}
# produces
(a b) (c d e)
(a c) (b d e)
(a d) (b c e)
(a e) (b c d)
(b c) (a d e)
(b d) (a c e)
(b e) (a c d)
(c d) (a b e)
(c e) (a b d)
(d e) (a b c)

# or with a hash
my $s = Set::Partition->new(
list => { b => bat, c => cat, d => dog },
partition => [2, 1],
);
while (my $p = $s->next) {
...
}

Set::Partition takes a list or hash of elements and a list numbers that represent the sizes of the partitions into which the list of elements should be arranged.
The resulting object can then be used as an iterator which returns a reference to an array of lists, that represents the original list arranged according to the given partitioning. All possible arrangements are returned, and the object returns undef when the entire combination space has been exhausted.

CGI::Application::Magic is a template based framework for CGI applications.

SYNOPSIS

package WebApp ;
use base CGI::Application::Magic ;

# optional runmethod
sub RM_myRunMmode
{
... do_something_useful ...
... no_need_to_set_page ...
... returned_value_will_be_ignored ...
}

# package where Template::Magic will looks up
package WebApp::Lookups ;

# this value will be substituted to each
# app_name label in each template that include it
our $app_name = WebApp 1.0 ;

# same for each Time label
sub Time { scalar localtime }

# and same for each ENV_table block
sub ENV_table
{
my ($self, # $self is your WebApp object
$zone) = @_ ; # $zone is the Template::Magic::Zone object
my @table ;
while (my @line = each %ENV)
{
push @table, @line
}
@table ;
}

Video::Info::Magic can resolve video filetype if possible.

SYNOPSIS

use strict;
use Video::Info::Magic qw(:all);

my $type = divine(/path/to/video.mpg );

print $type; #MPEG system stream data (maybe)

## ... see methods below

EXPORT

various constants related to video file formats. All are prefixed with "VIDEO_".
divine(): Employs /usr/share/magic entries to determine a files type, as well as GUID and other info from Microsoft, mplayer, transcode...

Gpart is a tool which tries to guess the primary partition table of a PC-type hard disk in case the primary partition table in sector 0 is damaged, incorrect or deleted. The guessed table can be written to a file or device. Supported (guessable) filesystem or partition types by Gpart are:
- DOS/Windows FAT (FAT 12/16/32)
- Linux ext2
- Linux swap partitions versions 0 and 1 (Linux >= v2.2.X)
- OS/2 HPFS
- Windows NT/2000 FS
- *BSD disklabels
- Solaris/x86 disklabels
- Minix FS
- Reiser FS
- Linux LVM physical volume module (LVM by Heinz Mauelshagen)
- SGI XFS on Linux
- BeOS filesystem
- QNX 4.x filesystem
Enhancements:
- New support for the following filesystems: BeOS, QNX 4.x & SGI XFS.
- Updated Reiser filesystem support (Francis Devereux).
- Updated LVM support.
- Several small fixes from contributors.

IP Tables network magic SysRq is a new iptables target that allows you to do the same as the magic sysrq key on a keyboard does, but over the network.

Why to use the remote sysrq?

Sometimes a remote server hangs and only responds to icmp echo request (ping). Every administrator of such machine is very unhappy because (s)he must go there and press the reset button. It takes a long time and its inconvenient. So here is a solution. Use the Network Magic SysRq and you will be able to do more than just pressing a reset button. You can remotely sync disks, remount them read-only, then do a reboot. And everything comfortably and only in a few seconds.

Is it secure?

That depends. Let me explain: You can restrict who can do this by setting the iptables firewall. But unfortunately, for simplicity, the Network Magic SysRq is based on a single packet request. This packet is encrypted and password protected, but if somebody can sniff it (s)he will be able to repeat (but not to change) the query (so-called replay attack). The query is also protected by a timestamp. When the packet is generated, it is stamped by current date and time. Then on the server side that stamp is compared with the current time of the server and if it is within the tolerance the request is accepted. Together with some other information, the timestamp is protected by SHA1 hash. This means that the potential attacker has a limited time to repeat the sniffed packet. If anybody requires a better security than this, some secure encrypted tunnel can be used. (not depending on userspace, of course!

How to install it?

Just type make.

When everything is compiled type make install as root and after that run depmod -a. Now you can load the kernel module by the command modprobe ipt_SYSRQ.

You would also like to configure the server password and the tolerance. This can be set when installing the module into a kernel, by specifying the module parameters passwd for password and tolerance for tolerance in seconds. The default values are passwd="" and tolerance=43200.

Example:

modprobe ipt_SYSRQ passwd="my_very_secret_password" tolerance=3600

Module options can also be specified in file /etc/modules.conf.

Example:

options ipt_SYSRQ passwd="my_very_secret_password" tolerance=3600

What to do on a server?

After the module is loaded you are able to deploy it using the iptables command.

Some examples of usage:

iptables -I INPUT -p udp --dport 9 -j SYSRQ

or

iptables -I INPUT -i eth1 -s 192.168.1.2 -p udp --dport 9 -j SYSRQ

Note that UDP port 9 is used. This is the default port for send_sysrq program, which shouldnt do any harm, as it defaults to discard service.

What to do on the remote machine?

Copy the executable binary send_sysrq to the remote (client) machine. Alternatively, you can compile ipt_sysrq there yourselves. After uncompressing the source package, you just need to do a make send_sysrq.

Now you can use the client program send_sysrq to send the sysrq request.

CGI::Builder::Magic Perl module contains CGI::Builder and Template::Magic integration.

SYNOPSIS

# just include it in your build

use CGI::Builder
qw| CGI::Builder::Magic
|;