Categories
SysOps

How to terminate active ssh sessions

Several months ago I have shortly described how to close a non-responsive ssh session, which comes in handy at times. Today I will describe how to close every active ssh session by inspecting existing pseudoterminals.

Categories
SysOps

How to inspect PostgreSQL queries

Sometimes I want to inspect and verify queries made by an application or hunt a bug that involves more complex queries. The essential part of this process requires altering PostgreSQL server configuration to log SQL statements.

Categories
SysOps

How to use recent version of Iceweasel in Debian Wheezy

Do you want to use the latest version of Iceweasel, also known as Firefox? Then add the repository provided by the Debian Mozilla team and choose between release, beta and aurora version.

Categories
SysOps

How to enable VPN connections inside Network Manager

Default Debian installation does not include VPN support inside the Network Manager applet. The reason behind this decision is probably the variety of available solutions.

Categories
Uncategorized

How to automatically share X session using VNC

Today, I will briefly describe how to automatically share X session on Debian Wheezy using VNC protocol.

Categories
Uncategorized

How to fix error when moving events between calendars

Recently, I noticed “Failed to save changes” error when tried to move events between distinct calendars. After a short investigation I found that this bug is already fixed, but not packaged for an easy upgrade, so I will shortly describe how to apply fix for Debian Wheezy and Kolab 3.3.

Categories
Uncategorized

How to automatically login user at the console

Whenever I see auto-login feature implemented by using X login manager, I immediately think about how to automatically login user at the console without even touching graphical user interface.

Categories
Uncategorized

How to create VLAN interface

VLAN (virtual local area network) is very useful concept as you can easily separate device management from users by using appropriate network devices and configuration. I will describe here in a form of a short note how to create VLAN interface using Debian system.