rdesktop is the essential tool for Remote Desktop Management of Windows boxes using Linux as your local machine. It is sometimes crucial to be able to transfer files using rdesktop, especially when there isn’t any FTP service (or equivalent). Luckily rdesktop supports file transfer modes. Before connecting you the Windows box, let’s make a directory […]
Knowledge base of VeriTeknik
Apache rewrite is an apache web server module which gives opportunity to change URL folders during opening of pages. At first it is hard to understand mod_rewrite but if you know what you are doing then it will become a usefull tool. You can reach the documents supplied by developer site located here: Apache Docs […]
BackupPC uses ssh and rsync to connect to the client hosts, backuppc user’s shared key must be distributed to client hosts in order log-in to the clients without password, you receive the error “filelist receive failed” as backuppc cannot log-in or cannot find rsync on the client. We assume that you already generated a private […]
Introduction Routing is the process of finding the route to a destination, and routing protocols determine how a router updates its route information. A router is attached to two or more networks, and its primary function is receiving IP packets through one network interface and forwarding them through another. The packets can travel through a […]
Even though major system scripting is usually done via bash (or other shell) scripting, it’s almost as common to see Python as a system administration scripting platform. Today, most major installers, daemons and package management software are written in Python. While using Python as a system scripting tool, it’s essential to keep using the standard […]
Hi there, it’s me again. Today, i’m gonna talk about CSS3 border features. By using CSS3, you can; create rounded borders (it was really a big problem cause we had to use images or junk javascript libraries) box shadows (it was also a big problem) use image files as border without using a design program […]
Below I’ll describe a couple of nice methods to generate passwords using Python and Bash. Actually there are a lot of ways you can accomplish this especially with bash, but using the /dev/urandom file seems to be the most clever one. The /dev/urandom device doesn’t only generate read-friendly characters, so it’s best to filter out […]
Earlier we’ve discussed target specification in detail. But it is almost as import to choose your method to scan the target host. Nmap can scan in various algorithms, we should choose wisely considering the network, operating system and firewalls. Even though we usually don’t know what network architecture or operating system the target is affiliated […]
If you have a .pfx file and you need it’s private.key, then you can use OpenSSL for extracting .pem from .pfx ( the openssl software is available at openssl.org ) To export the private key ( .pem ) from the PFX file and save it to a PEM file : $openssl pkcs12 -in /path/to/file_name.pfx -nocerts […]
[zimbra@ck]$ zmcontrol start Host mail.plugged.in Starting ldap…Done. Unable to determine enabled services from ldap. Enabled services read from cache. Service list may be inaccurate. Starting logger…Failed. Starting logswatch…ERROR: service.FAILURE (system failure: ZimbraLdapContext) (cause: javax.net.ssl.SSLHandshakeException sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target) zimbra logger service is not enabled! […]
Every now and then, we need to scan ports as system administrators, even if the target machine is owned by us or not. To achieve this, nmap is the well known and reliable tool which is available for almost every platform. But to use nmap, we need to understand the background of it a little. […]
The beauty of having multiple IP addresses on a single server is that you can run several services with different addressing. This way you can announce your FTP service on a different address and your HTTP on another. Below I’ll describe how to achieve this in Debian based and Red Hat based distros seperately. Using […]
Sometimes you need to search the contents of .gz files in your system. Unfortunately, grep doesn’t work on compressed files. To overcome this, people usually advise to first uncompress the file(s), and then grep your text, after that finally re-compress your file(s)… You don’t need to uncompress them in the first place. You can use […]
Cpanel’s Mailman is an open-source mailing list application. The problem is that there is no easy way to export subscribers from a list. Yet, here’s the solution. Step 1: Login into account via SSH ( as root ). Step 2: Find mailman directory. ( Default Location : /usr/local/cpanel/3rdparty/mailman/bin )
You’ve designed a database with MyISAM and suddenly realized that you need ACID (atomicity, consistency, isolation, durability) compliant features and transactions. Right, you should use InnoDB. But how to change storage engine for your previous tables ? As far as i know, changing the storage engine for tables is easy by alter command. But there’s one flaw. You should […]
If you want to clear contents of a file in unix, you could just delete the file and recreate it. But there are much more simple alternatives. You can use echo method. To empty a file just enter the command below. I use my php_error.log file for example. echo -n > /home/base/logs/php_error.log That’s it. Your […]
Here is a clumsy script to check on an FTP Service on a remote server if running or down. The script is written in Python and is a very draft one, but does the job. The main goal is to check whether we get any response from the FTP server while we try to connect […]
IMPORTANT NOTE: Never assume the directory structures exist in your system as written in the document. Never blindly follow security instructions — read, review, compare, apply as it fits your system., Update your server as necessary As its nature, Linux is a multi-developer operating system and you might see an update on any package everyday, an updater like […]
The other day I was working on a server and needed the LARGEST files on some directory – including its subdirectories. As it turns out, it’s a very simple task limiting the file size you want with the output of the find tool. The -size argument will define the borders of your output. Let’s say […]
DirectAdmin determines the admin password during installation and saves these passwords into the file called setup.txt. If you havent changed this password, you can find it in this file, to see the file contents: less /usr/local/directadmin/scripts/setup.txt adminpass= you can find admin password here, and if you didn’t change it after installing you should be able […]
Before changing MySQL root password you may try to recover default installation password. DirectAdmin MySQL root password is set within the installation process and written down to setup.txt. If you didn’t change this password you can find the default one in the setup.txt, use the command below to see the contents of /usr/local/directadmin/scripts/setup.txt: your password […]
There are some important processes after successfully installation of DirectAdmin and if you miss these steps, the system may not work efficiently. After logged in with the admin user: (default admin password is located at: /usr/local/directadmin/scripts/setup.txt) Add an additional IP for the second DNS Server, to do so, click to the “IP Management” link in […]
If you prepared your server with the directives we mentioned on the previous article, it will be so much easy to install DireactAdmin software. You must download the setup file from DirectAdmin site: Download DirectAdmin setup file & run: mkdir /root/DA cd /root/DA wget http://www.directadmin.com/setup.sh sh setup.sh Steps to follow: DirectAdmin setup will ask you […]
DirectAdmin is one of the mostly used Hosting Control Panels around, for single server installations it is easy to setup and start selling hosting busines, some advantages of DirectAdmin are; Easy to install, can be installed on a VPS or VDS also Less overhead, minimal code Easy to maintain & upgrade Easy to modify wtihout […]
Adding a task into crontab is relatively easy. You just enter the crontab with “$ crontab -e” and add the necessary job, save and exit. But adding a job in your bash script is not that simple, because what you have to do is, to get the entire list of the jobs, append your new […]