Nagios – New installation on Debian 9

If you have to install a really great network those such as Nagios those will be steps needed: 1.Installing Apache2 + PHP (Skip if you already have one):

2.Installing Nagios core:

3.Installing Nagios Plugins (needed !)

4.Enable SSL for Nagios (and not only)


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Creating swap partition

Swap partition is same thing as pagefile.sys for Windows. When we are using more RAM than we have, pagefile is used to store that extra data from memory. For this Linux use swap partition. While you install Linux distribution most installers suggest to make swap partition that is twice the size of your RAM. This […]

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Ubuntu – Recovery Mode stuck after fsck

You can try to pick ‘root – Drop to root shell prompt‘ from Recovery Menu  

Now you got root access to partition and can try to fix it from there.  

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Baikal – own calendar with ToDo list (CalDav) and address book (CardDav)

Using own CalDav and CardDav server can help you with creating private platform to synchronize event and contacts between multiply devices and other services like webmails. First let us download latest baikal version from  to /var/www/

Next extract it

Move files to destination ex. /var/www/

Create vhost config file for Apache […]

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Linux – Hide Bind version

If we would like to hide version of our bind server and make it harder for bot to sniff what version you use (assuming you always update 😉 ) you can make it by editing file: /etc/bind/named.conf.options:

Restart service:

Use dig to check that version you use now:


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Recover main MySQL password

*** If it is possible do this operation in environment without internet access ***


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Linux – Removing software from outside of repository

Sometimes you install software from outside of repository, sometimes you compile your package or install binary. There are few methods for uninstalling that software when the time is right. Method 1:

Method 2: This method is time consuming and also require you to do some steps BEFORE actually installing package. This method is best […]

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