Create a Sudo User on Debian or Ubuntu Rumi, January 29, 2017 Log in to your server as the root user. ssh root@server_ip_address Use the adduser command to add a new user to your system. Be sure to replace username with the user that you want to create. adduser username Set and confirm the new user’s password at the prompt. A strong… Continue Reading
Installing SqlMap in Ubuntu / any Linux distro for SQL Injection Rumi, January 27, 2017 SQLMAP is a automated SQL injection tool which does most of the work for you. If you don’t know what SQL injection is head over here: https://en.wikipedia.org/wiki/SQL_injection Using SQLMAP, you can “hack” many databases in very short time. In the next post, i will show you how to dump database tables… Continue Reading
All about VPN ports Rumi, January 26, 2017 1) If RRAS based VPN server is behind a firewall (i.e. a firewall is placed between Internet and RRAS server), then following ports need to be opened (bidirectional) on this firewall to allow VPN traffic to pass through: – For PPTP: IP Protocol=TCP, TCP Port number=1723 <- Used by PPTP control path IP Protocol=GRE (value… Continue Reading
Increase MySQL connections max_connections Rumi, January 19, 2017 If you need to increase MySQL Connections without MySQL restart do like below mysql> show variables like ‘max_connections’; +—————–+——-+ | Variable_name | Value | +—————–+——-+ | max_connections | 100 | +—————–+——-+ 1 row in set (0.00 sec) mysql> SET GLOBAL max_connections = 150; Query OK, 0 rows affected (0.00 sec)… Continue Reading
Learning watch command with examples! Rumi, January 18, 2017 watch date watch -d date watch -n 10 df -h watch -t date watch echo “‘”‘$$'”‘” watch echo $$ watch -n 0.5 echo $$ watch -n 1 ‘ps -e -o pid,uname,cmd,pmem,pcpu –sort=-pmem,-pcpu | head -15’ watch -d -n 1 ifconfig watch -n 1 tail /var/log/messages watch -d=cumulative date watch “du… Continue Reading
Fixing error: ‘Access denied for user ‘debian-sys-maint’@’localhost’ (using password: YES)’ Rumi, January 17, 2017 For all you Ubuntu/MySQL developers out there, have you ever seen the following? neo@thematrix:~$ sudo /etc/init.d/mysql restart * Stopping MySQL database server mysqld [fail] * Starting MySQL database server mysqld [ OK ] /usr/bin/mysqladmin: connect to server at ‘localhost’ failed error: ‘Access denied for user ‘debian-sys-maint’@’localhost’ (using password: YES)’ So,… Continue Reading
Tightvnc setup on Linux Mint Rumi, January 16, 2017 sudo apt-get install tightvncserver cd ~/.vnc ls nano (or your favorite text editor.) xstartup. edit anything you need to. Then run: tightvncserver Go to your other computer. Run a vnc viewer. And enter in your IP like- <vncserverIP>:1 Continue Reading
UDP Load Balancing using PEN Rumi, January 5, 2017 First setup PEN load balancer using this document. After that, keep digging below 🙂 And that’s it, so now if we run pen we see it now has UDP support. root@penudp:~/pen-0.18.0# pen usage: pen [-C addr:port] [-X] [-b sec] [-S N] [-c N] [-e host[:port]] [-t sec] [-x N] [-w… Continue Reading
Linux Remove All Partitions or Data And Create Empty Disk Rumi, December 13, 2016 Use the following dd command to remove data from /dev/hdX: dd if=/dev/zero of=/dev/hdX bs=512 count=1 OR for sata disk, use the following syntax: dd if=/dev/zero of=/dev/sdX bs=512 count=1 In this example, empty sata disk /dev/sdb, enter (you must be login as the root user): fdisk /dev/sdb dd if=/dev/zero of=/dev/sdb bs=512… Continue Reading
The safest way to clean up /boot partition in Debian or Ubuntu Rumi, December 7, 2016 First check your kernel version, so you won’t delete the in-use kernel image, running: uname -r Now run this command for a list of installed kernels: dpkg –list ‘linux-image*’ and delete the kernels you don’t want/need anymore by running this: sudo apt-get remove linux-image-VERSION Replace VERSION with the version of… Continue Reading