Free VNC server software on Windows

ByEric Ma Mar 24, 2018Mar 24, 2018

RealVNC only gives free version to personal usage of their server software while it limits the functions. Could you suggest some good free VNC server software with full functions?

TightVNC is an open-source software for VNC with servers and clients.

You can download the server software for Windows from TightVNC download page: http://www.tightvnc.com/download.php

The software is GPL licensed and it is free. It also provides a commercial license if you would like to integrate TightVNC with closed-source products.

How to detect memory leaks of C programs in Linux?

ByEric Ma Mar 24, 2018Jun 26, 2018

How to detect memory leaks of C programs in Linux? I also have access to the source code of the program. There are many posts related to this: Easy and quick tools on Linux (while not very accurate): http://blog.thewebsitepeople.org/2011/03/linux-memory-leak-detection/ Valgrind: manual and a tutorial. gperftools has the Google Heap Profiler which can checks for memory…

How to remove the bottom panel in gnome 3 classic?

ByEric Ma Mar 24, 2018Mar 24, 2018

The gnome 3 classic’s bottom panel looks not useful to me. I do not use it. How to remove the bottom panel in gnome 3 classic? That bottom panel is from the “Window List” plugin. The gnome 3 classic package depends on that plugin package on CentOS 7 as far as I checked. And Gnome…

In Bash script, how to join multiple lines from a file?

ByQ A Mar 24, 2018

In Bash script, how to join multiple lines from a file? For example, to join the lines a good boy to a good boy You can use tr command, something like: tr -s ‘n’ ‘ ‘ < file.txt It just goes through its input and makes changes according to what you specify in two sets…

How to balance DataNode storage in HDFS?

ByEric Ma Mar 24, 2018Feb 26, 2019

As nodes are added and deleted in a Hadoop cluster. Storage usage across DataNodes may be different. Some DataNodes’ disks are almost used up while some others’ are almost empty. How to balance data across DataNodes in HDFS? Hadoop provides the balancer to redistribute the data. Brief introduction to balancer in Hadoop: balancer. The design…

How to make a unique temporary file in Bash on Linux?

ByEric Ma Mar 24, 2018Mar 24, 2018

It is common to make a unique temporary file. How to make a unique temporary file in Bash on Linux safely and quickly? You can use the mktemp program. In the simplest way, tmpfile=$(mktemp) The file will be like /tmp/tmp.j0wD39Mr3b if you do not prefer any meaningful names. You can set the file to your…

How to improve MPlayer video quality?

ByEric Ma Mar 24, 2018Mar 24, 2018

How to improve MPlayer video quality by selecting a “better” video rendering/filter? You can choose a different video filter. I use hqdn3d which gives me the best quality. Be careful on machines with low CPUs. To use hqdn3d, put this line into your ~/.mplayer/config: vf=hqdn3d Check more options of video filters in MPlayer manual. Read…

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