1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

#!/bin/sh
# Author: Wojtek Jamrozy (www.wojtekrj.net)
# BE SURE WHAT ARE YOU DOING - YOU CAN LOST IMPORTANT DATA
 
if [ $# != 1 ]; then
	echo "usage: $0 <name of device>"
	exit 1
fi
 
echo "You choose $1 device to shred"
echo "Are you sure (it will destroy ALL data on this device)? Type upercase yes:"
read yes
TMP_DIR=/tmp/_tmpfs
SIZE=100 # size of pattern in megabytes
if [ "$yes" = "YES" ]; then
	echo "Generating random pattern..."
	mkdir -p $TMP_DIR
	sudo mount -t tmpfs  tmp $TMP_DIR
	dd if=/dev/urandom of=$TMP_DIR/plik bs=${SIZE}MB count=1 2> /dev/null
	echo "Generating random pattern finished..."
	echo "Starting shreding $1"
	before=`date +%s`
	i=0
	while [ 1 ]; do	
		sudo dd if=$TMP_DIR/plik of=$1 bs=${SIZE}MB seek=$i 2> /dev/null
		if [ $? != 0 ]
		then
			break
		fi
		i=$((i+1))
		after=`date +%s`
		echo "$((i*SIZE))MB have been copied\nAverage speed: $((i*SIZE/(after-before+1))) MB/s"
	done
	after=`date +%s`
	echo "Average speed: $(((i+1)*SIZE/(after-before+1))) MB/s"
	rm $TMP_DIR/plik
	sudo umount $TMP_DIR
	rm -R $TMP_DIR
else
	echo "You haven't typed \"YES\"\nExiting..."
fi

Share/Save

Exaile screenshot

You can find more in: www.exaile.org

Share/Save

http://en.wikipedia.org/wiki/SQLite

2. Install sqlitebrowser:

sudo apt-get install sqlitebrowser

3. Run sqlitebrowser
4. Open file:
/home/your username/.mozilla/firefox/your profile/places.sqlite
It’s a SQLite database where firefox stores information about history.
5. Execute following command:

SELECT url FROM moz_places WHERE url LIKE "%wojtekrj.net%"

6. You should have list of all vistied by you pages from my blog.

Share/Save

valgrind your_program

Example of usage:
We have following C++ program (tst.cpp):

int main() {
	int * tab = new int[1000000];
	return 0;
}

Obviously it generates memory leak. We compile it to tst file and execute:

valgrind tst

==20777== Memcheck, a memory error detector.
==20777== Copyright (C) 2002-2008, and GNU GPL'd, by Julian Seward et al.
==20777== Using LibVEX rev 1884, a library for dynamic binary translation.
==20777== Copyright (C) 2004-2008, and GNU GPL'd, by OpenWorks LLP.
==20777== Using valgrind-3.4.1-Debian, a dynamic binary instrumentation framework.
==20777== Copyright (C) 2000-2008, and GNU GPL'd, by Julian Seward et al.
==20777== For more details, rerun with: -v
==20777==
==20777==
==20777== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 17 from 1)
==20777== malloc/free: in use at exit: 4,000,000 bytes in 1 blocks.
==20777== malloc/free: 1 allocs, 0 frees, 4,000,000 bytes allocated.
==20777== For counts of detected errors, rerun with: -v
==20777== searching for pointers to 1 not-freed blocks.
==20777== checked 93,180 bytes.
==20777==
==20777== LEAK SUMMARY:
==20777==    definitely lost: 0 bytes in 0 blocks.
==20777==      possibly lost: 4,000,000 bytes in 1 blocks.
==20777==    still reachable: 0 bytes in 0 blocks.
==20777==         suppressed: 0 bytes in 0 blocks.
==20777== Rerun with --leak-check=full to see details of leaked memory.

Share/Save