Sending SMS Notifications From Nagios

A quick howto for Sending SMS Notifications From Nagios.

Installing/Configuring caching nameserver (named) on Linux (Fedora 12)

In this article you will learn howto Installing and Configuring caching nameserver.

Sending SNMP Traps from Nagios

In this article you will learn howto send SNMP Traps from Nagios.

Installing configuring Gnokii on Linux

Gnokii provides tools and a user space driver for use with mobile phones. Using Gnokii one can send/receive SMS, phonebook, call management and others. Read compelete article to learn how to install and configure Gnokii under Linux

Nagios Read Only Access

Somtime you have to provide read only Nagios Web UI access for exmaple to outside customers, here you can find out how to do it.

host - DNS lookup utility

host is a simple utility for performing DNS lookups. It is normally used to convert names to IP addresses and vice versa. Read More

Securing Bind (named) Configuration using views

In this article you will learn how to configure a secure bind (named) DNS server for your network ie internal and external network using views. Read More

Using Gnokii for sending/receiving SMS from Linux PC: Here

Granting read only permission in IDSGranting read only permission to users in IDS

Configuring sendmail as outgoing relay A very quick and simple how to configure sendmail as outgoing rely for loopback only on solaris, and Unix

Installing Postfix on Solaris-10 A very quick and simple howto install Postfix on Solaris

Installing Informix Dynamic Server IDS on Linux/Unix A very quick and simple howto install IDS on Unix/Linux

Informix IDS backup/restore using ontape Another quick howto, for backing up and restoring informix IDS using ontape utility.

Virtualization with Virtualbox This is how I install Virtualbox on Fedora 9

System emulation with QEMU QEMU is an open source emulator for complete PC systems. In addition to emulating a processor, QEMU permits emulation of all necessary subsystems, such as networking and video hardware.

MPlayer Installation from Source MPlayer a movie player for Linux. Supports reading from network, dvd, vcd, file, pipes, and v4l. The recommended way to install MPlayer is to compile from source.

ccomp.sh file(s) compresses script compresses the file given as the first argument as best as it can, whichever compression method (gzip/bzip2) works better on the file will be kept. (contributed by Hikaru)

Iptables Tutorial Oskar Andreasson iptables tutorial v. 1.2.0 in .pdf format (note: new version of this tutorial 1.2.2 is out).

Oskar Andreasson is back with new version of iptables tutorial 1.2.2, All versions are as usual available at: http://iptables-tutorial.frozentux.net

Here are few scripts that could help slackware users to create slackware packages (.tgz) from sources.

slackconfig cp the script to /usr/local/bin (dont' forget to chmod +x it). After untarring the package source cd to the directory and type "slackconfig" instead of typing "./configure"

slackmake cp the script to /usr/local/bin (dont' forget to chmod +x it). Type "slackmake" as root instead of typing "make"

SpamControl patch for qmail The excellent SPAMCONTROL is an add-on (patch) for qmail-smtpd to filter and control unsolicited commercial E-Mails (UCE/SPAM) by means of the available (E)SMTP session protocol elements. In addition, it allows a state-of-the-art wire-speed filtering of the messages' content and more.

vnStat From the author: "vnStat is a network traffic monitor for Linux that keeps a log of daily network traffic for the selected interface(s). vnStat isn't a packet sniffer. The traffic information is analyzed from the /proc -filesystem, so vnStat can be used without root permissions. However at least a 2.2.x kernel is required"

Download: Source

Slackware (tgz): Package
After installing the vnstat on slackware "installpkg vnstat-1.4-i486-1sbt.tgz" (if you are installing from source then do read the INSTALL), run ..
# vnstat --testkernel (to test your linux kernel is supported)

If you got error.. Unable to open database directory "/var/lib/vnstat".
Make sure it exists and is read enabled for this user.

Then create the vnstat directory "mkdir /var/lib/vnstat"

# vnstat -u -i eth0 (this will creates a file /var/lib/vnstat/eth0)
# cat /etc/cron.d/vnstat (and paste the line from this file in the bottom of crontab -e)
My crontab entry for vnstat looks like ...

# For vnstat, a traffic monitor
0-55/5 * * * * if [ -x /usr/bin/vnstat ] && [ `ls /var/lib/vnstat/ | wc -l` -ge 1 ]; then /usr/bin/vnstat -u; fi

Note: You can safely delete "rm -r /etc/cron.d".
Wait for 5 minutes and then run "vnstat -d" to start monitoring traffic on eth0 inteface.
vnstat --help (for other useful switches)